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ESP8266_relayhandler.h
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ESP8266_relayhandler.h
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/*
ESP8266_relayhandler.h
This is a firmware application to implement the ASCOM ALPACA switch interface API.
Each device can manage more than one switch - up to numswitches which is user configured.
Each nominal switch can be 1 of 4 types - binary relays (no and nc) and digital pwm and DAC outputs.
Hence the setup allows specifying the number of switches per device and the host/device name.
This particular switch device assumes the use of port pins allocated from the device via a pcf8574 I2C port expansion device.
Using an ESP8266-01 this leaves one pin free to be a digital device.
Using an ESP8266-12 this leaves a number of pins free to be a digital device.
Use of a DAC requires (presumably) an i2C DAC or an onboard DAC tied to a pin.
In use of the ASCOM Api
All URLs include an argument 'Id' which contains the number of the switch attached to this device instance
The switch device number is in the path itself. Hence the getUriField function
Internally this code keeps the state of the switch in the switchEntry structure and uses (value != 1.0F) to mean false.
To do:
Debug, trial
Layout:
(ESP8266-12)
GPIO 4,2 to SDA
GPIO 5,0 to SCL
(ESP8266-01)
GPIO 0 - SDA
GPIO 1 - Rx - re-use as PWM output for testing purposes
GPIO 2 - SCL
GPIO 3 - Tx
All 3.3v logic.
*/
#ifndef _ESP8266_RELAYHANDLER_H_
#define _ESP8266_RELAYHANDLER_H_
#include "Webrelay_eeprom.h"
#include <Wire.h>
#include "AlpacaErrorConsts.h"
#include "ASCOMAPISwitch_rest.h"
//Function definitions
void copySwitch( SwitchEntry* sourceSe, SwitchEntry* targetSe );
void initSwitch( SwitchEntry* targetSe );
SwitchEntry** reSize( SwitchEntry** old, int newSize );
bool getUriField( char* inString, int searchIndex, String& outRef );
//Deprecated in favour of splitting up in to separate chunks.
//String& setupFormBuilder( String& htmlForm, String& errMsg );
String& setupFormBuilderHeader( String& htmlForm );
String& setupFormBuilderDeviceHeader( String& htmlForm, String& errMsg ); //For device setup
String& setupFormBuilderDeviceStrings( String& htmlForm );
String& setupFormBuilderDriverHeader( String& htmlForm, String& errMsg ); //For per-driver setup when we have 1 or more drivers attached
String& setupFormBuilderDriver0Switches( String& htmlForm, int index );
String& setupFormBuilderFooter( String& htmlForm );
//Device settings
void sendDeviceSetup( int returnCode, String& message, String& err );
void handlerDeviceSetup(void);
void handlerDeviceHostname(void);
void handlerDeviceLocation(void);
void handlerDeviceUdpPort(void);
//Driver0 settings
void sendDriver0Setup( int returnCode, String& message, String& err );
void handlerDriver0Setup(void);
void handlerDriver0SetupNumSwitches(void);
void handlerDriver0Maxswitch(void);
void handlerDriver0CanWrite(void);
void handlerDriver0SwitchState(void);
void handlerDriver0SwitchDescription(void);
void handlerDriver0SwitchName(void);
void handlerDriver0SwitchType(void);
void handlerDriver0SwitchValue(void);
void handlerDriver0MinSwitchValue(void);
void handlerDriver0MaxSwitchValue(void);
void handlerDriver0SwitchStep(void);
void handlerDriver0SetupSwitches(void);
void handlerNotFound();
void handlerRestart();
void handlerNotImplemented();
void handlerStatus(void);
/*
* This function will write a copy of the provided deviceEntry structure into the internal memory array.
* switch Entry may be a pointer to a single item or an array of items. ID must be in range;
*/
void copySwitch( SwitchEntry* sourceSe, SwitchEntry* targetSe )
{
strncpy( targetSe->description, sourceSe->description, MAX_NAME_LENGTH);
strncpy( targetSe->switchName, sourceSe->switchName, MAX_NAME_LENGTH);
targetSe->writeable = sourceSe->writeable;
targetSe->type = SWITCH_RELAY_NO;
targetSe->min = sourceSe->min;
targetSe->max = sourceSe->max;
targetSe->step = sourceSe->step;
targetSe->value = sourceSe->value;
targetSe->pin = sourceSe->pin;
}
void initSwitch( SwitchEntry* targetSe )
{
String output;
output = "Default description";
strncpy( targetSe->description, output.c_str(), MAX_NAME_LENGTH);
output = "Switch Name";
strncpy( targetSe->switchName, output.c_str(), MAX_NAME_LENGTH);
targetSe->writeable = true;
targetSe->type = SWITCH_RELAY_NO;
targetSe->min = 0.0F;
targetSe->max = 0.0F;
targetSe->step = 1.0F;
targetSe->value = 0.0F;
targetSe->pin = NULLPIN;
}
/*
* This function re-sizes the existing switchEntry array by re-allocating memory and copying if required.
* returns pointer to array of switches
*/
SwitchEntry** reSize( SwitchEntry** old, int newSize )
{
int i=0;
SwitchEntry* newse;
SwitchEntry** pse = (SwitchEntry** ) calloc( sizeof (SwitchEntry*), newSize );
DEBUGS1( "reSize called: " );DEBUGSL1( newSize );
if ( newSize < numSwitches )
{
for ( i=0 ; i < newSize; i++ )
pse[i] = old[i];
//Handle the remaining
for ( ; i < numSwitches; i++ )
{
if( old[i]->description != nullptr )
free( old[i]->description );
if( old[i]->switchName != nullptr ) free( old[i]->switchName );
free( old[i] );
}
}
else if ( newSize == numSwitches)
{
//do nothing
free(pse);
pse = old;
}
else //bigger than before
{
for ( i = 0; i < numSwitches; i++ )
pse[i] = old[i];
for ( ; i < newSize; i++ )
{
newse = (SwitchEntry*) calloc( sizeof (SwitchEntry), 1 );
newse->description = (char*)calloc( MAX_NAME_LENGTH, sizeof(char) );
newse->switchName = (char*)calloc( MAX_NAME_LENGTH, sizeof(char) );
pse[i] = newse;
initSwitch( newse );
}
}
numSwitches = newSize;
DEBUGS1("reSize completed, numSwitches updated to");DEBUGSL1(newSize);
return pse;
}
bool getUriField( char* inString, int searchIndex, String& outRef )
{
char *p = inString;
char *str;
char delims1[] = {"//"};
char delims2[] = {"/:"};
int chunkCtr = 0;
bool status = false;
int localIndex = 0;
localIndex = String( inString ).indexOf( delims1 );
if( localIndex >= 0 )
{
while ((str = strtok_r(p, delims2, &p)) != NULL) // delimiter is the semicolon
{
if ( chunkCtr == searchIndex && !status )
{
outRef = String( str );
status = true;
}
chunkCtr++;
}
}
else
status = false;
return status;
}
//GET /switch/{device_number}/maxswitch
//The number of switch devices managed by this driver
void handlerDriver0Maxswitch(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "MaxSwitch", Success , "" );
root["Value"] = numSwitches;
root.printTo(message);
server.send(200, "application/json", message);
return ;
}
//GET /switch/{device_number}/canwrite
//Indicates whether the specified switch device can be written to
void handlerDriver0CanWrite(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
int statusCode = 400;
int switchID = -1;
String argToSearchFor = "Id";
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "CanWrite", Success , "" );
if( hasArgIC( argToSearchFor, server, false ) )
{
switchID = server.arg(argToSearchFor).toInt();
if ( switchID >= 0 && switchID < numSwitches )
{
root["Value"] = switchEntry[switchID]->writeable;
statusCode = 200;
}
else
{
statusCode = 400;
root["ErrorMessage"] = "Argument switch Id out of range";
root["ErrorNumber"] = (int) invalidValue ;
}
}
else
{
statusCode = 400;
root["ErrorMessage"] = "Missing switchID argument";
root["ErrorNumber"] = (int) invalidOperation ;
}
root.printTo(message);
server.send( statusCode , "application/json", message);
return ;
}
//GET /switch/{device_number}/getswitch
//PUT /switch/{device_number}/setswitch
//Get/Set the state of switch device id as a boolean - treats as binary
void handlerDriver0SwitchState(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
int returnCode = 200;
double switchValue;
bool bValue;
bool newState = false;
int switchID = -1;
String argToSearchFor[2] = {"Id", "State"};
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "SwitchState", Success , "" );
if( hasArgIC( argToSearchFor[0], server, false ) )
switchID = server.arg( argToSearchFor[0] ).toInt();
else
{
String output = "Missing argument: switchID";
root["ErrorNumber"] = invalidOperation;
root["ErrorMessage"] = output;
returnCode = 400;
server.send(returnCode, "application/json", message);
return;
}
DEBUGS1( "SwitchID:"); DEBUGSL1( switchID);
if ( switchID >= 0 && switchID < numSwitches )
{
if( server.method() == HTTP_GET )
{
switch ( switchEntry[switchID]->type )
{
case SWITCH_RELAY_NO:
case SWITCH_RELAY_NC:
switchValue = switchEntry[switchID]->value;
if ( switchValue != 1.0F )
bValue = false;
else
bValue = true;
root["Value"] = bValue;
returnCode = 200;
break;
case SWITCH_PWM:
switchValue = switchEntry[switchID]->value;
bValue = false;
root["Value"] = switchValue;
returnCode = 200;
break;
case SWITCH_ANALG_DAC:
default:
returnCode = 400;
root["ErrorMessage"] = "Invalid state retrieval for switch type - not boolean" ;
root["ErrorNumber"] = invalidValue ;
break;
}
}
else if (server.method() == HTTP_PUT && hasArgIC( argToSearchFor[1], server, false ) )
{
switch( switchEntry[switchID]->type )
{
case SWITCH_RELAY_NO:
case SWITCH_RELAY_NC:
DEBUGSL1( "Found relay to set");
if( server.arg( argToSearchFor[1] ).equalsIgnoreCase( "true" ) )
newState = true;
else
newState = false;
if( reverseRelayLogic )
switchDevice.write( switchID, (newState) ? 0 : 1 );
else
switchDevice.write( switchID, (newState) ? 1 : 0 );
switchEntry[switchID]->value = (newState)? 1.0F : 0.0F;
returnCode = 200;
break;
case SWITCH_PWM:
DEBUGSL1( "Found PWM to set");
switchValue = server.arg( argToSearchFor[1] ).toInt();
switchEntry[switchID]->value = switchValue;
returnCode = 200;
break;
case SWITCH_ANALG_DAC:
default:
returnCode = 400;
root["ErrorMessage"] = "Invalid state for non-boolean switch type" ;
root["ErrorNumber"] = invalidOperation ;
break;
}
}
else
{
String output = "";
Serial.println( "Error: method not available" );
root["ErrorNumber"] = invalidOperation;
output = "http verb:";
output += server.method();
output += " not available";
root["ErrorMessage"] = output;
returnCode = 400;
}
}
else
{
returnCode = 400;
root["ErrorMessage"] = "Invalid switch ID as argument";
root["ErrorNumber"] = invalidValue ;
}
root.printTo(message);
server.send(returnCode, "application/json", message);
return;
}
//GET /switch/{device_number}/getswitchdescription
//Gets the description of the specified switch device
void handlerDriver0SwitchDescription(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
int returnCode = 200;
String argToSearchFor = "Id";
int switchID = -1;
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "SwitchDescription", Success, "" );
if( hasArgIC( argToSearchFor, server, false ) )
{
switchID = server.arg( argToSearchFor ).toInt();
if( switchID >=0 && switchID < numSwitches )
root["Value"] = switchEntry[switchID]->description;
else
{
root["ErrorNumber"] = invalidValue;
root["ErrorMessage"] = "Out of range argument: switchID";
returnCode = 400;
}
}
else
{
root["ErrorNumber"] = invalidOperation;
root["ErrorMessage"] = "Missing argument: switchID";
returnCode = 400;
}
root.printTo(message);
server.send(returnCode, "application/json", message);
return;
}
//GET /switch/{device_number}/getswitchname
//PUT /switch/{device_number}/setswitchname
//Get/set the name of the specified switch device
void handlerDriver0SwitchName(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
int returnCode = 200;
int switchID;
String newName = "";
String argToSearchFor[2] = {"Id", "Name"};
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "SwitchName", Success, "" );
if( hasArgIC( argToSearchFor[0], server, false ) )
{
switchID = server.arg(argToSearchFor[0]).toInt();
if ( switchID >= 0 && switchID < numSwitches )
{
if ( server.method() == HTTP_GET )
{
root["Value"] = switchEntry[switchID]->switchName;
returnCode = 200;
}
else if( server.method() == HTTP_PUT && hasArgIC( argToSearchFor[1], server, false ) )
{
int sLen = strlen( server.arg( argToSearchFor[1] ).c_str() );
if ( sLen > MAX_NAME_LENGTH -1 )
{
root["ErrorMessage"]= "Switch name too long";
root["ErrorNumber"] = invalidValue ;
returnCode = 400;
}
else
{
if ( switchEntry[switchID]->switchName != nullptr )
free( switchEntry[switchID]->switchName );
switchEntry[switchID]->switchName = (char*) calloc( MAX_NAME_LENGTH, sizeof(char) );
strcpy( switchEntry[switchID]->switchName, server.arg( argToSearchFor[1] ).c_str() );
}
}
else
{
//Invalid http verb
returnCode = 400;
root["ErrorMessage"]= "Invalid HTTP verb found";
root["ErrorNumber"] = invalidOperation;
}
}
else
{
//invalid switch id
returnCode = 400;
root["ErrorMessage"]= "Invalid switch ID - outside range";
root["ErrorNumber"] = invalidValue ;
}
}
else
{
//invalid switch id
returnCode = 400;
root["ErrorMessage"]= "Missing switch ID";
root["ErrorNumber"] = invalidOperation ;
}
root.printTo(message);
server.send(returnCode, "application/json", message);
return;
}
//Non-ascom function
//GET /switch/{device_number}/getswitchtype
//PUT /switch/{device_number}/setswitchtype
//Get/set the name of the specified switch device
void handlerDriver0SwitchType(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
int returnCode = 200;
int switchID;
String newName = "";
String argToSearchFor[2] = {"Id", "Name"};
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "SwitchType", 0, "" );
if( hasArgIC( argToSearchFor[0], server, false ) )
{
switchID = server.arg(argToSearchFor[0]).toInt();
}
else
{
returnCode = 400;
root["ErrorMessage"]= "Missing switchID argument";
root["ErrorNumber"] = invalidValue ;
root.printTo(message);
server.send(returnCode, "application/json", message);
return;
}
if ( switchID >= 0 && switchID < numSwitches )
{
if ( server.method() == HTTP_GET )
{
root["Value"] = switchEntry[switchID]->type;
}
else if( server.method() == HTTP_PUT && hasArgIC( argToSearchFor[1], server, false ) )
{
enum SwitchType newType = ( enum SwitchType ) server.arg(argToSearchFor[1]).toInt();
switch( newType )
{
case SWITCH_RELAY_NO:
case SWITCH_RELAY_NC:
switchEntry[switchID]->type = (enum SwitchType) newType;
switchEntry[switchID]->min = MINVAL;
switchEntry[switchID]->max = MAXBINARYVAL;
switchEntry[switchID]->step = MAXBINARYVAL;
break;
case SWITCH_PWM:
//Default frequency is 1000Hz
switchEntry[switchID]->type = (enum SwitchType) newType;
switchEntry[switchID]->min = (float) MINVAL;
switchEntry[switchID]->max = (float) MAXDIGITALVAL;
switchEntry[switchID]->step = 1.0F;
switchEntry[switchID]->value = switchEntry[switchID]->min;
analogWriteRange ( 1024);
analogWrite( switchEntry[switchID]->pin, switchEntry[switchID]->value );
returnCode = 200;
break;
case SWITCH_ANALG_DAC:
default:
root["ErrorMessage"]= "Invalid switch type not found or implemented";
root["ErrorNumber"] = invalidValue ;
returnCode = 400;
break;
}
}
else
{
returnCode = 400;
root["ErrorMessage"]= "Invalid HTTP verb or arguments found";
root["ErrorNumber"] = invalidOperation ;
}
}
else
{
returnCode = 400;
root["ErrorMessage"]= "Argument switchID out of range";
root["ErrorNumber"] = invalidValue ;
}
root.printTo(message);
server.send(returnCode, "application/json", message);
return;
}
//GET /switch/{device_number}/getswitchvalue
//PUT /switch/{device_number}/setswitchvalue
//Get/Set the value of the specified switch device as a double - ie not a binary setting
void handlerDriver0SwitchValue(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
int returnCode = 200;
float value = 0.0F;
uint32_t switchID = 0;
String argToSearchFor[2] = {"Id", "Value"};
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "SwitchValue", 0, "" );
if ( hasArgIC( argToSearchFor[0], server, false ) )
{
switchID = server.arg( argToSearchFor[0] ).toInt();
}
else
{
root["ErrorMessage"] = "Missing argument - switchID ";
root["ErrorNumber"] = invalidValue ;
returnCode = 400;
root.printTo(message);
server.send(returnCode, "application/json", message);
return;
}
if ( switchID >= 0 && switchID < (uint32_t) numSwitches )
{
if( server.method() == HTTP_GET )
{
switch( switchEntry[switchID]->type )
{
case SWITCH_PWM:
root["Value"] = switchEntry[switchID]->value;
break;
case SWITCH_ANALG_DAC:
root["Value"] = switchEntry[switchID]->value;
returnCode = 200;
break;
case SWITCH_RELAY_NO:
case SWITCH_RELAY_NC:
returnCode = 400;
root["ErrorMessage"] = "Invalid analogue operation for binary/boolean switch type - use getSwitch";
root["ErrorNumber"] = invalidOperation ;
break;
default:
break;
}
}
else if( server.method() == HTTP_PUT && hasArgIC( argToSearchFor[1], server, false ) )
{
value = (float) server.arg( argToSearchFor[1] ).toFloat();
switch( switchEntry[switchID]->type )
{
case SWITCH_PWM:
if ( value >= switchEntry[switchID]->min &&
value <= switchEntry[switchID]->max )
{
switchEntry[switchID]->value = value;
analogWrite( switchEntry[switchID]->pin, switchEntry[switchID]->value );
returnCode = 200;
}
else
{
root["ErrorMessage"] = "Digital write out of range for switch in PWM mode";
root["ErrorNumber"] = invalidOperation ;
returnCode = 200;
}
break;
case SWITCH_RELAY_NO:
case SWITCH_RELAY_NC:
returnCode = 400;
root["ErrorMessage"] = "Invalid analogue operation for binary/boolean switch type";
root["ErrorNumber"] = invalidOperation ;
break;
case SWITCH_ANALG_DAC:
if ( value >= switchEntry[switchID]->min &&
value <= switchEntry[switchID]->max )
{
switchEntry[switchID]->value = value;
//e.g. analogue_write( switchEntry[switchID]->value, switchEntry[switchID]->pin );
root["ErrorMessage"] = "DAC Not implemented yet - Invalid digital operation for switch";
root["ErrorNumber"] = invalidOperation ;
}
returnCode = 200;
break;
default:
break;
}
}
else
{
returnCode = 400;
root["ErrorMessage"] = "Invalid HTTP verb method for this URI or missing output value";
root["ErrorNumber"] = invalidOperation ;
}
}
else
{
root["ErrorMessage"] = "SwitchID value out of range.";
root["ErrorNumber"] = invalidValue ;
returnCode = 200;
}
root.printTo(message);
server.send(returnCode, F("application/json"), message);
return;
}
//GET /switch/{device_number}/minswitchvalue
//Gets the minimum value of the specified switch device as a double
void handlerDriver0MinSwitchValue(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
int returnCode = 200;
int switchID = -1;
String argToSearchFor = "id";
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "MinSwitchValue", Success, "" );
if ( hasArgIC( argToSearchFor, server, false ) )
{
switchID = server.arg( argToSearchFor ).toInt();
if( switchID >= 0 && switchID < numSwitches )
{
root.set<double>("Value", switchEntry[switchID]->min );
}
else
{
root["ErrorMessage"] = "SwitchID value out of range.";
root["ErrorNumber"] = invalidValue ;
returnCode = 400;
}
}
else
{
root["ErrorMessage"] = "SwitchID argument missing .";
root["ErrorNumber"] = invalidOperation ;
returnCode = 400;
}
root.printTo(message);
server.send(returnCode, F("application/json"), message);
return;
}
//GET /switch/{device_number}/maxswitchvalue
//Gets the maximum value of the specified switch device as a double
void handlerDriver0MaxSwitchValue(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
int returnCode = 200;
int switchID = -1;
String argToSearchFor = "Id";
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "MaxSwitchValue", Success, "" );
if ( hasArgIC(argToSearchFor, server, false ) )
{
switchID = server.arg(argToSearchFor).toInt();
if ( switchID >= 0 && switchID < numSwitches )
{
root.set<double>("Value", switchEntry[switchID]->max );
returnCode = 200;
}
else
{
root["ErrorMessage"] = "SwitchID value out of range.";
root["ErrorNumber"] = invalidValue ;
returnCode = 400;
}
}
else
{
root["ErrorMessage"] = "Missing switchID argument.";
root["ErrorNumber"] = invalidOperation ;
returnCode = 400;
}
root.printTo(message);
server.send(returnCode, F("application/json"), message);
return;
}
//GET /switch/{device_number}/switchstep
//Returns the step size that this device supports (the difference between successive values of the device).
void handlerDriver0SwitchStep(void)
{
String message;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
uint32_t switchID = -1;
int returnCode = 200;
String argToSearchFor = "Id";
DynamicJsonBuffer jsonBuffer(256);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "SwitchStep", Success, "" );
if ( hasArgIC(argToSearchFor, server, false ) )
{
switchID = server.arg(argToSearchFor).toInt();
if( switchID >= 0 && switchID < (uint32_t) numSwitches )
{
root.set<double>("Value", switchEntry[switchID]->step );
returnCode = 200;
}
else
{
root["ErrorMessage"] = "SwitchID out of range.";
root["ErrorNumber"] = invalidValue ;
returnCode = 400;
}
}
else
{
root["ErrorMessage"] = "Missing switchID argument.";
root["ErrorNumber"] = invalidOperation ;
returnCode = 400;
}
root.printTo(message);
server.send(returnCode, F("application/json"), message);
return;
}
////////////////////////////////////////////////////////////////////////////////////
//Additional non-ASCOM custom setup calls
void handlerNotFound()
{
String message;
int responseCode = 400;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
DynamicJsonBuffer jsonBuffer(250);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "HandlerNotFound", invalidOperation , "No REST handler found for argument - check ASCOM Switch v2 specification" );
root["Value"] = 0;
root.printTo(message);
server.send(responseCode, F("application/json"), message);
}
void handlerRestart()
{
String message;
int responseCode = 200;
server.sendHeader( WiFi.hostname().c_str(), String("/status"), true);
server.send ( 302, F("text/html"), "<!Doctype html><html>Redirecting for restart</html>");
DEBUGSL1(F("Reboot requested") );
device.restart();
}
void handlerNotImplemented()
{
String message;
int responseCode = 400;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
DynamicJsonBuffer jsonBuffer(250);
JsonObject& root = jsonBuffer.createObject();
jsonResponseBuilder( root, clientID, transID, serverTransID++, "HandlerNotFound", notImplemented , "No REST handler implemented for argument - check ASCOM Dome v2 specification" );
root["Value"] = 0;
root.printTo(message);
server.send(responseCode, F("application/json"), message);
}
//GET /switch/{device_number}/status
//Get a descriptor of all the switches managed by this driver for discovery purposes
void handlerStatus(void)
{
String message, timeString;
uint32_t clientID = 0;//(uint32_t)server.arg("ClientID").toInt();
uint32_t transID = 0;//(uint32_t)server.arg("ClientTransactionID").toInt();
int i=0;
int returnCode = 200;
DynamicJsonBuffer jsonBuffer(1024); //Uplifted in size = 256 + numSwitches * ( sizeof ( switchentry ) + 3* MAX_NAME_LENGTH )
JsonObject& root = jsonBuffer.createObject();
JsonArray& entries = root.createNestedArray( "switches" );
jsonResponseBuilder( root, clientID, transID, serverTransID++, "Status", 0, "" );
root["time"] = getTimeAsString( timeString );
root["host"] = myHostname;
root["build version"] = String(__DATE__) + FPSTR(BuildVersionName);
root["connected"] = ( connected != NOT_CONNECTED )?"true":"false";
root["connectedId"] = (int) connected;
for( i = 0; i < numSwitches; i++ )
{
//Can I re-use a single object or do I need to create a new one each time? A: new one each time.
JsonObject& entry = jsonBuffer.createObject();
entry["description"] = switchEntry[i]->description;
entry["name"] = switchEntry[i]->switchName;
entry["type"] = (int) switchEntry[i]->type;
entry["pin"] = (int) switchEntry[i]->pin;
entry.set("writeable", switchEntry[i]->writeable );
entry["min"] = switchEntry[i]->min;
entry["max"] = switchEntry[i]->max;
entry["step"] = switchEntry[i]->step;
if( switchEntry[i]->type == SWITCH_RELAY_NO || switchEntry[i]->type == SWITCH_RELAY_NC )
{
entry["state"] = (switchEntry[i]->value == 1.0F ) ? true : false ;
}
else
entry["value"] = switchEntry[i]->value; //Needs check limits to 1-1024, DAC and PWM limits.
entries.add( entry );
}
//Do something here about outputting the ADC records too
#if defined USE_ADC
JsonArray& voltages = root.createNestedArray( "voltages" );
for( i = 0; i < lastChannel; i++ )
{
JsonObject& entry = jsonBuffer.createObject();
entry["adcReading"] = (float) adcReading[i];
entry["adcScale"] = (float) adcScaleFactor[i];
entry["adcGain"] = (float) adcGainFactor[ adcGainSettings[i] ];
switch (i)
{
case 0: entry["12v Voltage"] = (float) ( adcReading[i] * adcGainFactor[adcGainSettings[i]] * adcScaleFactor[i] ) ;
break;
case 1: entry["5v Voltage"] = (float) ( adcReading[i] * adcGainFactor[adcGainSettings[i]] * adcScaleFactor[i] );
break;
case 2: entry["3v3 Voltage"] = (float) ( adcReading[i] * adcGainFactor[adcGainSettings[i]] * adcScaleFactor[i] );
break;
case 3: entry["Raw Voltage"] = (float) ( adcReading[i] * adcGainFactor[adcGainSettings[i]] * adcScaleFactor[i] );
break;
default:
break;
}
voltages.add( entry );
}
#endif
Serial.println( message);
root.printTo(message);
server.send(returnCode, F("application/json"), message);
return;
}
//Helper function
void sendDeviceSetup( int returnCode, String& message, String& err )
{
//Send large pages in chunks
server.setContentLength(CONTENT_LENGTH_UNKNOWN);
setupFormBuilderHeader( message );
server.send( returnCode, F("text/html"), message );
message = "";
setupFormBuilderDeviceHeader( message, err );
server.sendContent( message );
message = "";
setupFormBuilderDeviceStrings( message );
server.sendContent( message );
message = "";
setupFormBuilderFooter( message );
server.sendContent( message );
}
/*
* Handlers to do custom setup that can't be done without a windows ascom driver setup form.
* Returns device page
*/
void handlerDeviceSetup( )
{
String timeString, message, err;
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
uint32_t switchID = -1;
int returnCode = 200;
if ( server.method() == HTTP_GET )
{
sendDeviceSetup( returnCode, message, err );
}
}
/*
* Handler to update the hostname from the form.
*/
void handlerDeviceHostname(void)
{
String message, timeString, err= "";
uint32_t clientID = (uint32_t)server.arg("ClientID").toInt();
uint32_t transID = (uint32_t)server.arg("ClientTransactionID").toInt();
uint32_t switchID = -1;
int returnCode = 400;
String argToSearchFor[] = { "hostname" };
if ( server.method() == HTTP_POST || server.method() == HTTP_PUT || server.method() == HTTP_GET)
{
if( hasArgIC( argToSearchFor[0], server, false ) )
{
String newHostname = server.arg(argToSearchFor[0]) ;
//process form variables.
if( newHostname.length() > 0 && newHostname.length() < MAX_NAME_LENGTH-1 )
{
//process new hostname
strncpy( myHostname, newHostname.c_str(), MAX_NAME_LENGTH );
saveToEeprom();
returnCode = 200;
}
else
{
err = "New name too long";
}
}
}
else