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@@ -1,5 +1,6 @@
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#include <Arduino.h>
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#include <WiFiManager.h>
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#include <Preferences.h>
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#include <string.h>
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#include <MicroOcpp.h>
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@@ -18,7 +19,9 @@ enum LEDState
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LED_INITIALIZING, // Blue blinking - Initialization and WiFi connecting
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LED_WIFI_CONNECTED, // Blue solid - WiFi connected, connecting to OCPP server
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LED_OCPP_CONNECTED, // Green solid - Successfully connected to OCPP server
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LED_ERROR // Red - Error state
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LED_ERROR, // Red solid - Error state
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LED_RESET_TX, // Yellow solid - 3s BOOT button hold (Ready to clear transaction)
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LED_FACTORY_RESET // Magenta fast blink - 7s BOOT button hold (Ready to factory reset)
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};
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static int s_retry_num = 0;
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@@ -31,6 +34,19 @@ static const unsigned long BLINK_INTERVAL = 200; // 200ms blink interval
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uint8_t mac[6];
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char cpSerial[13];
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// OCPP Configuration Variables
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char ocpp_backend[128];
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char cp_identifier[64];
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char auth_key[64];
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bool shouldSaveConfig = false;
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// callback notifying us of the need to save config
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void saveConfigCallback()
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{
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Serial.println("Should save config");
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shouldSaveConfig = true;
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}
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struct mg_mgr mgr;
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/**
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@@ -86,6 +102,38 @@ void updateLED()
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leds[0] = Rgb{255, 0, 0}; // Red solid
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leds.show();
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break;
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case LED_RESET_TX:
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// Yellow fast blink - Ready to clear transaction
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if (current_time - s_blink_last_time >= 100)
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{
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s_blink_last_time = current_time;
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s_blink_on = !s_blink_on;
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if (s_blink_on)
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leds[0] = Rgb{150, 150, 0}; // Yellow
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else
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leds[0] = Rgb{0, 0, 0};
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leds.show();
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}
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break;
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case LED_FACTORY_RESET:
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// Magenta fast blink - Ready to factory reset
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if (current_time - s_blink_last_time >= 100)
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{
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s_blink_last_time = current_time;
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s_blink_on = !s_blink_on;
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if (s_blink_on)
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leds[0] = Rgb{255, 0, 255}; // Magenta
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else
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leds[0] = Rgb{0, 0, 0};
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leds.show();
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}
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break;
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}
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}
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@@ -96,6 +144,10 @@ void setup()
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snprintf(cpSerial, sizeof(cpSerial),
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"%02X%02X%02X%02X%02X%02X",
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mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
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// Auto-generate Charge Point Identifier based on MAC (e.g. HLCP_A1B2C3)
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snprintf(cp_identifier, sizeof(cp_identifier), "HLCP_%s", cpSerial + 6);
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// reset LED
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leds[0] = Rgb{0, 0, 0};
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leds.show();
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@@ -113,7 +165,30 @@ void setup()
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leds[0] = Rgb{255, 255, 0};
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leds.show();
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// Load configuration from Preferences
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Preferences preferences;
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preferences.begin("ocpp-config", false);
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String b = preferences.getString("backend", CFG_OCPP_BACKEND);
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String a = preferences.getString("auth_key", CFG_AUTHORIZATIONKEY ? CFG_AUTHORIZATIONKEY : "");
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Serial.printf("\n[OCPP] Loaded Backend URL: %s\n", b.c_str());
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Serial.printf("[OCPP] Loaded Auth Key length: %d\n", a.length());
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strncpy(ocpp_backend, b.c_str(), sizeof(ocpp_backend));
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strncpy(auth_key, a.c_str(), sizeof(auth_key));
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WiFiManager wm;
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wm.setSaveConfigCallback(saveConfigCallback);
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wm.setSaveParamsCallback(saveConfigCallback);
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wm.setParamsPage(true);
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// Use autocomplete=off to prevent browsers from autofilling old URLs after a reset
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WiFiManagerParameter custom_ocpp_backend("backend", "OCPP Backend URL", ocpp_backend, 128, "autocomplete=\"off\"");
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WiFiManagerParameter custom_auth_key("auth_key", "Auth Key (leave blank if none)", auth_key, 64, "autocomplete=\"off\"");
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wm.addParameter(&custom_ocpp_backend);
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wm.addParameter(&custom_auth_key);
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const char *customHeadElement = R"rawliteral(
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<style>
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:root {
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@@ -255,7 +330,19 @@ void setup()
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</style>
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)rawliteral";
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wm.setCustomHeadElement(customHeadElement);
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bool autoConnectRet = wm.autoConnect((String("HLCP_") + String(cpSerial).substring(String(cpSerial).length() - 6)).c_str(), cpSerial);
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bool autoConnectRet = wm.autoConnect(cp_identifier, cpSerial);
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if (shouldSaveConfig)
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{
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strncpy(ocpp_backend, custom_ocpp_backend.getValue(), sizeof(ocpp_backend));
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strncpy(auth_key, custom_auth_key.getValue(), sizeof(auth_key));
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preferences.putString("backend", ocpp_backend);
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preferences.putString("auth_key", auth_key);
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Serial.println("Saved new OCPP config to Preferences");
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}
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preferences.end();
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if (!autoConnectRet)
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{
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Serial.println("Failed to connect and hit timeout");
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@@ -267,8 +354,20 @@ void setup()
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s_led_state = LED_WIFI_CONNECTED;
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mg_mgr_init(&mgr);
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MicroOcpp::MOcppMongooseClient *client = new MicroOcpp::MOcppMongooseClient(&mgr, CFG_OCPP_BACKEND, CFG_CP_IDENTIFIER, CFG_AUTHORIZATIONKEY, "", MicroOcpp::makeDefaultFilesystemAdapter(MicroOcpp::FilesystemOpt::Use_Mount_FormatOnFail), MicroOcpp::ProtocolVersion(1, 6));
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const char *final_auth_key = (strlen(auth_key) > 0) ? auth_key : nullptr;
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MicroOcpp::MOcppMongooseClient *client = new MicroOcpp::MOcppMongooseClient(&mgr, ocpp_backend, cp_identifier, final_auth_key, "", MicroOcpp::makeDefaultFilesystemAdapter(MicroOcpp::FilesystemOpt::Use_Mount_FormatOnFail), MicroOcpp::ProtocolVersion(1, 6));
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mocpp_initialize(*client, ChargerCredentials(CFG_CP_MODAL, CFG_CP_VENDOR, CFG_CP_FW_VERSION, cpSerial, nullptr, nullptr, CFG_CB_SERIAL, nullptr, nullptr), MicroOcpp::makeDefaultFilesystemAdapter(MicroOcpp::FilesystemOpt::Use_Mount_FormatOnFail));
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// For development/recovery: Set up BOOT button (GPIO 0)
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pinMode(0, INPUT_PULLUP);
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// Forcefully accept rejected RemoteStopTransaction (if hardware goes out of sync with CSMS)
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setOnSendConf("RemoteStopTransaction", [](JsonObject payload)
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{
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if (!strcmp(payload["status"], "Rejected")) {
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Serial.println("[main] MicroOcpp rejected RemoteStopTransaction! Force overriding and stopping charging...");
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endTransaction(nullptr, "Remote", 1);
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} });
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}
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}
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@@ -277,19 +376,89 @@ void loop()
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mg_mgr_poll(&mgr, 10);
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mocpp_loop();
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auto ctx = getOcppContext();
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if (ctx && ctx->getConnection().isConnected())
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// Handle BOOT button (GPIO 0) interactions for recovery
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bool is_btn_pressed = (digitalRead(0) == LOW);
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static unsigned long boot_press_time = 0;
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static bool boot_was_pressed = false;
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if (is_btn_pressed)
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{
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if (s_led_state != LED_OCPP_CONNECTED)
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if (!boot_was_pressed)
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{
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s_led_state = LED_OCPP_CONNECTED;
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boot_was_pressed = true;
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boot_press_time = millis();
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}
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unsigned long held_time = millis() - boot_press_time;
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if (held_time >= 7000)
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{
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s_led_state = LED_FACTORY_RESET;
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}
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else if (held_time >= 3000)
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{
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s_led_state = LED_RESET_TX;
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}
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}
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else
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{
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if (s_led_state != LED_WIFI_CONNECTED)
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if (boot_was_pressed)
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{
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s_led_state = LED_WIFI_CONNECTED;
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unsigned long held_time = millis() - boot_press_time;
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if (held_time >= 7000)
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{
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Serial.println("BOOT button held for > 7s! Clearing WiFi and OCPP settings, then restarting...");
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// Clear WiFi completely
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WiFi.disconnect(true, true);
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WiFiManager wm;
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wm.resetSettings();
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// Clear Preferences explicitely
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Preferences preferences;
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preferences.begin("ocpp-config", false);
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preferences.remove("backend");
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preferences.remove("auth_key");
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preferences.clear();
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preferences.end();
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Serial.println("NVS ocpp-config cleared.");
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// Clear MicroOcpp FS configs (this removes MO's cached URL)
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auto fs = MicroOcpp::makeDefaultFilesystemAdapter(MicroOcpp::FilesystemOpt::Use_Mount_FormatOnFail);
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fs->remove(MO_WSCONN_FN);
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Serial.println("MicroOcpp config cache cleared.");
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// Give time for serial to print and NVS to sync
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delay(1000);
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ESP.restart();
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}
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else if (held_time >= 3000)
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{
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Serial.println("BOOT button held for > 3s! Forcefully ending dangling transaction...");
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endTransaction(nullptr, "PowerLoss", 1);
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}
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boot_was_pressed = false;
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// Temporarily set to init so the logic below restores the actual network state accurately
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s_led_state = LED_INITIALIZING;
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}
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}
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// Only update default LED states if button is not overriding them
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if (!is_btn_pressed)
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{
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auto ctx = getOcppContext();
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if (ctx && ctx->getConnection().isConnected())
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{
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if (s_led_state != LED_OCPP_CONNECTED)
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{
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s_led_state = LED_OCPP_CONNECTED;
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}
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}
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else
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{
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if (s_led_state != LED_WIFI_CONNECTED)
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{
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s_led_state = LED_WIFI_CONNECTED;
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}
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}
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}
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