Which SoftwareSerial is intended to be used?

[mcsarge]

I cannot compile this code because it is asking for SoftwareSerial, and I do not know which one you have chosen to use. Or should I set the following flag: MT_SOFTWARESERIAL_SUPPORTED to turn it off, since I am on an ESP32?

[mcsarge]

Here is what I did to make it work:
in mt_internals.h:
#ifndef MT_INTERNALS_H
#define MT_INTERNALS_H

#if defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_ESP32) || defined(ESP32)
#define MT_WIFI_SUPPORTED
#else
#define MT_SOFTWARESERIAL_SUPPORTED
#endif

and it mt_serial.cpp
#include "mt_internals.h"

#ifdef MT_SOFTWARESERIAL_SUPPORTED
#include <SoftwareSerial.h>
SoftwareSerial *serial;
#else
#define serial (&Serial1)
#endif

void mt_serial_init(int8_t rx_pin, int8_t tx_pin, uint32_t baud) {
#ifdef MT_SOFTWARESERIAL_SUPPORTED
serial = new SoftwareSerial(rx_pin, tx_pin);
serial->begin(baud);
#endif
#ifdef MT_WIFI_SUPPORTED
mt_wifi_mode = true;
#else
mt_wifi_mode = false;
#endif

mt_serial_mode = true;
}

[etleyden]

Also was experiencing this issue. This did not work for me, and instead resulted in a cascade of errors:

/Users/etleyden/Library/Arduino15/packages/esp32/tools/esp-xs3/2302/bin/../lib/gcc/xtensa-esp32s3-elf/12.2.0/../../../../xtensa-esp32s3-elf/bin/ld: /private/var/folders/69/4nb_brqs0tg9gyskbzzt2xl40000gn/T/arduino/sketches/4C3A989D1ADC5240C353340C87550E56/libraries/Meshtastic/mt_protocol.cpp.o:(.literal._Z13mt_send_radioPKcj+0xc): undefined reference to `_Z18mt_wifi_send_radioPKcj'
/Users/etleyden/Library/Arduino15/packages/esp32/tools/esp-xs3/2302/bin/../lib/gcc/xtensa-esp32s3-elf/12.2.0/../../../../xtensa-esp32s3-elf/bin/ld: /private/var/folders/69/4nb_brqs0tg9gyskbzzt2xl40000gn/T/arduino/sketches/4C3A989D1ADC5240C353340C87550E56/libraries/Meshtastic/mt_protocol.cpp.o:(.literal._Z25handle_config_complete_idmm+0x0): undefined reference to `_Z26mt_wifi_reset_idle_timeoutm'
/Users/etleyden/Library/Arduino15/packages/esp32/tools/esp-xs3/2302/bin/../lib/gcc/xtensa-esp32s3-elf/12.2.0/../../../../xtensa-esp32s3-elf/bin/ld: /private/var/folders/69/4nb_brqs0tg9gyskbzzt2xl40000gn/T/arduino/sketches/4C3A989D1ADC5240C353340C87550E56/libraries/Meshtastic/mt_protocol.cpp.o:(.literal._Z7mt_loopm+0x4): undefined reference to `_Z12mt_wifi_loopm'
/Users/etleyden/Library/Arduino15/packages/esp32/tools/esp-xs3/2302/bin/../lib/gcc/xtensa-esp32s3-elf/12.2.0/../../../../xtensa-esp32s3-elf/bin/ld: /private/var/folders/69/4nb_brqs0tg9gyskbzzt2xl40000gn/T/arduino/sketches/4C3A989D1ADC5240C353340C87550E56/libraries/Meshtastic/mt_protocol.cpp.o:(.literal._Z7mt_loopm+0x8): undefined reference to `_Z19mt_wifi_check_radioPcj'
/Users/etleyden/Library/Arduino15/packages/esp32/tools/esp-xs3/2302/bin/../lib/gcc/xtensa-esp32s3-elf/12.2.0/../../../../xtensa-esp32s3-elf/bin/ld: /private/var/folders/69/4nb_brqs0tg9gyskbzzt2xl40000gn/T/arduino/sketches/4C3A989D1ADC5240C353340C87550E56/libraries/Meshtastic/mt_protocol.cpp.o: in function `_Z13mt_send_radioPKcj':
/Users/etleyden/Documents/Arduino/libraries/Meshtastic/src/mt_protocol.cpp:44: undefined reference to `_Z18mt_wifi_send_radioPKcj'
/Users/etleyden/Library/Arduino15/packages/esp32/tools/esp-xs3/2302/bin/../lib/gcc/xtensa-esp32s3-elf/12.2.0/../../../../xtensa-esp32s3-elf/bin/ld: /private/var/folders/69/4nb_brqs0tg9gyskbzzt2xl40000gn/T/arduino/sketches/4C3A989D1ADC5240C353340C87550E56/libraries/Meshtastic/mt_protocol.cpp.o: in function `_Z25handle_config_complete_idmm':
/Users/etleyden/Documents/Arduino/libraries/Meshtastic/src/mt_protocol.cpp:178: undefined reference to `_Z26mt_wifi_reset_idle_timeoutm'
/Users/etleyden/Library/Arduino15/packages/esp32/tools/esp-xs3/2302/bin/../lib/gcc/xtensa-esp32s3-elf/12.2.0/../../../../xtensa-esp32s3-elf/bin/ld: /private/var/folders/69/4nb_brqs0tg9gyskbzzt2xl40000gn/T/arduino/sketches/4C3A989D1ADC5240C353340C87550E56/libraries/Meshtastic/mt_protocol.cpp.o: in function `_Z7mt_loopm':
/Users/etleyden/Documents/Arduino/libraries/Meshtastic/src/mt_protocol.cpp:287: undefined reference to `_Z12mt_wifi_loopm'
/Users/etleyden/Library/Arduino15/packages/esp32/tools/esp-xs3/2302/bin/../lib/gcc/xtensa-esp32s3-elf/12.2.0/../../../../xtensa-esp32s3-elf/bin/ld: /Users/etleyden/Documents/Arduino/libraries/Meshtastic/src/mt_protocol.cpp:288: undefined reference to `_Z19mt_wifi_check_radioPcj'
collect2: error: ld returned 1 exit status

exit status 1

Compilation error: exit status 1

My search for a fix continues 🚢

[bserret]

I also cannot compile this. I am getting this error - Is this because the nano doesn't have enough RAM?

/usr/lib/gcc/avr/7.3.0/../../../avr/bin/ld: address 0x800c6f of /tmp/arduino_build_945720/protosendrec.ino.elf section .bss' is not within region data'
/usr/lib/gcc/avr/7.3.0/../../../avr/bin/ld: address 0x800c6f of /tmp/arduino_build_945720/protosendrec.ino.elf section .bss' is not within region data'
collect2: error: ld returned 1 exit status

exit status 1
Error compiling for board Arduino Nano.