Config option: Limit to 10A in simplified mode

Signed-off-by: Cornelius Claussen <[email protected]>

modules/EvseManager/EvseManager.cpp

@@ -119,6 +119,11 @@ void EvseManager::init() {
 
 void EvseManager::ready() {
     bsp = std::unique_ptr<IECStateMachine>(new IECStateMachine(r_bsp));
+
+    if (config.hack_simplified_mode_limit_10A) {
+        bsp->set_ev_simplified_mode_evse_limit(true);
+    }
+
     error_handling =
         std::unique_ptr<ErrorHandling>(new ErrorHandling(r_bsp, r_hlc, r_connector_lock, r_ac_rcd, p_evse));
 

modules/EvseManager/EvseManager.hpp

@@ -78,6 +78,7 @@ struct Conf {
     int hack_present_current_offset;
     bool hack_pause_imd_during_precharge;
     bool hack_allow_bpt_with_iso2;
+    bool hack_simplified_mode_limit_10A;
     bool autocharge_use_slac_instead_of_hlc;
     bool enable_autocharge;
     std::string logfile_suffix;

modules/EvseManager/IECStateMachine.cpp

@@ -337,6 +337,12 @@ void IECStateMachine::set_pwm(double value) {
         }
     }
 
+    if (ev_simplified_mode_evse_limit and ev_simplified_mode and value > ev_simplified_mode_evse_limit_pwm) {
+        EVLOG_warning
+            << "Simplified mode: Limiting output PWM to 10A due to config option \"hack_simplified_mode_limit_10A\"";
+        value = ev_simplified_mode_evse_limit_pwm;
+    }
+
     r_bsp->call_pwm_on(value * 100);
 
     feed_state_machine();

modules/EvseManager/IECStateMachine.hpp

@@ -89,6 +89,10 @@ class IECStateMachine {
 
     void connector_force_unlock();
 
+    void set_ev_simplified_mode_evse_limit(bool l) {
+        ev_simplified_mode_evse_limit = l;
+    }
+
     // Signal for internal events type
     sigslot::signal<CPEvent> signal_event;
     sigslot::signal<> signal_lock;
@@ -103,6 +107,9 @@ class IECStateMachine {
     bool pwm_running{false};
     bool last_pwm_running{false};
 
+    static constexpr float ev_simplified_mode_evse_limit_pwm{10 / 0.6 / 100.}; // Fixed 10A limit
+    // If set to true, EVSE will limit to 10A in case of simplified charging
+    bool ev_simplified_mode_evse_limit{false};
     bool ev_simplified_mode{false};
     bool has_ventilation{false};
     bool power_on_allowed{false};

modules/EvseManager/manifest.yaml

@@ -142,6 +142,13 @@ config:
       always be positive but power supply may actually discharge the car.
     type: boolean
     default: false
+  hack_simplified_mode_limit_10A:
+    description:
+      Limit PWM to 10A if EV uses simplified charging mode. Set to false to be compliant with IEC61851-1:2019 section A.2.3.
+      It is the responsibility of the EV to limit to 10A according to the norm. Enable this option to deviate from the norm
+      and limit from the EVSE side.
+    type: boolean
+    default: false
   autocharge_use_slac_instead_of_hlc:
     description: Use slac ev mac address for autocharge instead of EVCCID from HLC
     type: boolean