persistent config for ESP8266

lib/patrix/config.cpp

@@ -23,7 +23,7 @@ void configReset() {
   nvs_flash_init();
   config.begin("config", false);
   config.putString("HOSTNAME", HOSTNAME);
-  configLoad();
+  configLoaded();
 }
 
 String configGetString(const char *name, const char *fallback, bool allowEmpty) {
@@ -48,34 +48,125 @@ double configGetDouble(const char *name, double fallback) {
   return config.getDouble(name);
 }
 
-bool configPutDouble(const char *name, double fallback) {
-  return config.value(name, fallback) == 0;
+bool configPutDouble(const char *name, double value) {
+  return config.value(name, value) == 0;
 }
 
 #else
 
+#include <EEPROM.h>
+#include <ArduinoJson.h>
+
+JsonDocument json;
+
+bool configRead();
+
+bool configWrite();
+
+size_t configWriteBytes(int *address, uint8_t *data, size_t size);
+
+size_t configReadBytes(int *address, uint8_t *data, size_t size);
+
 void configSetup() {
-  // ESP8266 FAKE
+  configRead();
 }
 
 void configReset() {
-  // ESP8266 FAKE
+  json.clear();
+  json["HOSTNAME"] = HOSTNAME;
+  configWrite();
 }
 
 String configGetString(const char *name, const char *fallback, bool allowEmpty) {
-  return fallback;
+  if (!json.containsKey(name)) {
+    return fallback;
+  }
+  String value = json[name];
+  if (!allowEmpty && value.isEmpty()) {
+    return fallback;
+  }
+  return value;
 }
 
 bool configPutString(const char *name, const char *value) {
-  return false;
+  json[name] = value;
+  return configWrite();
 }
 
 double configGetDouble(const char *name, double fallback) {
-  return fallback;
+  if (!json.containsKey(name)) {
+    return fallback;
+  }
+  return json[name];
 }
 
-bool configPutDouble(const char *name, double fallback) {
+bool configPutDouble(const char *name, double value) {
+  json[name] = value;
+  return configWrite();
+}
+
+bool configRead() {
+  size_t length;
+  char buffer[512];
+
+  bool ok = true;
+  int address = 0;
+  EEPROM.begin(512);
+  ok &= configReadBytes(&address, reinterpret_cast<uint8_t *>(&length), sizeof length);
+  ok &= configReadBytes(&address, reinterpret_cast<uint8_t *>(buffer), length);
+  ok &= EEPROM.end();
+
+  if (ok) {
+    JsonDocument tmp;
+    deserializeJson(tmp, buffer);
+    if (tmp.is<JsonObject>() && !tmp.isNull() && tmp.containsKey("HOSTNAME")) {
+      info("Config loaded");
+      json = tmp;
+      return true;
+    } else {
+      error("Failed to parse config JSON");
+    }
+  } else {
+    error("Failed to load config from EEPROM");
+  }
   return false;
 }
 
+bool configWrite() {
+  char buffer[512];
+  size_t length = serializeJson(json, buffer, sizeof buffer);
+
+  bool ok = true;
+  int address = 0;
+  EEPROM.begin(512);
+  ok &= configWriteBytes(&address, reinterpret_cast<uint8_t *>(&length), sizeof length);
+  ok &= configWriteBytes(&address, reinterpret_cast<uint8_t *>(buffer), length);
+  ok &= EEPROM.end();
+  return ok;
+}
+
+size_t configWriteBytes(int *address, uint8_t *data, size_t size) {
+  uint8_t *b = data;
+  for (; b < data + size; b++) {
+    EEPROM.write((*address)++, *b);
+    if (*address >= EEPROM.length()) {
+      error("END OF EEPROM!!!");
+      break;
+    }
+  }
+  return b - data;
+}
+
+size_t configReadBytes(int *address, uint8_t *data, size_t size) {
+  uint8_t *b = data;
+  for (; b < data + size; b++) {
+    *b = EEPROM.read((*address)++);
+    if (*address >= EEPROM.length()) {
+      error("END OF EEPROM!!!");
+      break;
+    }
+  }
+  return b - data;
+}
+
 #endif

lib/patrix/config.h

@@ -7,7 +7,7 @@ void configSetup();
 
 void configReset();
 
-void configLoad();
+void configLoaded();
 
 String configGetString(const char *name, const char *fallback, bool allowEmpty);
 

platformio.ini

@@ -29,7 +29,7 @@ monitor_port = ${COMMON.monitor_port}
 monitor_speed = ${COMMON.monitor_speed}
 monitor_filters = ${COMMON.monitor_filters}
 lib_deps = ${COMMON.lib_deps}
-build_flags = -D HOSTNAME=\"TEST32\" -D WIFI_SSID=\"${COMMON.WIFI_SSID}\" -D WIFI_PKEY=\"${COMMON.WIFI_PKEY}\" -D OTA_PASSWORD=\"OtaAuthPatrixTEST32\" -D BOOT_DELAY=false -D DEBUG_LOG=false
+build_flags = -D TEST32 -D HOSTNAME=\"TEST32\" -D WIFI_SSID=\"${COMMON.WIFI_SSID}\" -D WIFI_PKEY=\"${COMMON.WIFI_PKEY}\" -D OTA_PASSWORD=\"OtaAuthPatrixTEST32\" -D BOOT_DELAY=false -D DEBUG_LOG=false
 
 [env:TEST8266]
 upload_port = 10.0.0.162
@@ -44,7 +44,7 @@ monitor_port = ${COMMON.monitor_port}
 monitor_speed = ${COMMON.monitor_speed}
 monitor_filters = esp8266_exception_decoder
 lib_deps = ${COMMON.lib_deps}
-build_flags = -D HOSTNAME=\"TEST8266\" -D WIFI_SSID=\"${COMMON.WIFI_SSID}\" -D WIFI_PKEY=\"${COMMON.WIFI_PKEY}\" -D OTA_PASSWORD=\"OtaAuthPatrixTEST8266\" -D BOOT_DELAY=true -D DEBUG_LOG=true
+build_flags = -D TEST8266 -D HOSTNAME=\"TEST8266\" -D WIFI_SSID=\"${COMMON.WIFI_SSID}\" -D WIFI_PKEY=\"${COMMON.WIFI_PKEY}\" -D OTA_PASSWORD=\"OtaAuthPatrixTEST8266\" -D BOOT_DELAY=true -D DEBUG_LOG=true
 
 [env:Fermenter]
 upload_port = 10.0.0.164
@@ -59,4 +59,4 @@ monitor_port = ${COMMON.monitor_port}
 monitor_speed = ${COMMON.monitor_speed}
 monitor_filters = esp8266_exception_decoder
 lib_deps = ${COMMON.lib_deps}
-build_flags = -D HOSTNAME=\"Fermenter\" -D WIFI_SSID=\"${COMMON.WIFI_SSID}\" -D WIFI_PKEY=\"${COMMON.WIFI_PKEY}\" -D OTA_PASSWORD=\"OtaAuthPatrixFermenter\" -D BOOT_DELAY=true -D DEBUG_LOG=true
+build_flags = -D FERMENTER -D HOSTNAME=\"Fermenter\" -D WIFI_SSID=\"${COMMON.WIFI_SSID}\" -D WIFI_PKEY=\"${COMMON.WIFI_PKEY}\" -D OTA_PASSWORD=\"OtaAuthPatrixFermenter\" -D BOOT_DELAY=true -D DEBUG_LOG=true

src/Fermenter.cpp

@@ -1,3 +1,5 @@
+#if defined(FERMENTER)
+
 #include <Patrix.h>
 #include "sensors/Dallas.h"
 #include "sensors/DallasSensor.h"
@@ -10,31 +12,37 @@
 #define CONTROL_PWM_BITS      10
 #define CONTROL_PWM_MAX       (pow(2, CONTROL_PWM_BITS) - 1)
 
+#define PID_DEFAULT_P         100
+#define PID_DEFAULT_I         10
+#define PID_DEFAULT_D         0
+#define PID_DEFAULT_TARGET    31
+#define PID_DEFAULT_OVER      5
+
 Dallas dallas(SENSOR_GPIO);
 
 DallasSensor sensor(dallas, 0x3D0417C1D740FF28, "sensor", 0.5, 5, 60);
 
 ArduPID pid;
 
-double temperatureTarget = 31;
+double proportional = PID_DEFAULT_P;
+
+double integral = PID_DEFAULT_I;
+
+double derivative = PID_DEFAULT_D;
+
+double temperatureTarget = PID_DEFAULT_TARGET;
+
+double temperatureOver = PID_DEFAULT_OVER;
 
 double temperatureCurrent = NAN;
 
-double temperatureMaxOvershoot = 5;
-
 double heaterPWM = 0;
 
-double proportional = 1;
-
-double integral = 0;
-
-double derivative = 0;
-
 void patrixSetup() {
   dallas.begin();
   analogWriteResolution(CONTROL_PWM_BITS);
 
-  configLoad();
+  configLoaded();
 
   pid.begin(&temperatureCurrent, &heaterPWM, &temperatureTarget, proportional, integral, derivative);
   pid.setOutputLimits(0, CONTROL_PWM_MAX);
@@ -52,7 +60,7 @@ void patrixLoop() {
     heaterPWM = 0;
   }
 
-  const bool emergencyCutOff = heaterPWM > 0 && temperatureCurrent > temperatureTarget + temperatureMaxOvershoot;
+  const bool emergencyCutOff = heaterPWM > 0 && temperatureCurrent > temperatureTarget + temperatureOver;
   if (emergencyCutOff) {
     heaterPWM = 0;
   }
@@ -67,7 +75,7 @@ void patrixLoop() {
     int heaterPercent = (int) round(100.0 * heaterPWM / CONTROL_PWM_MAX);
     debug("p: %.10f | i: %.10f | d: %.10f | current: %5.2f | target: %5.2f | heater: %3d%%", proportional, integral, derivative, temperatureCurrent, temperatureTarget, heaterPercent);
     if (emergencyCutOff) {
-      error("[EMERGENCY CUTOFF] temperatureCurrent (=%5.2f) > temperatureTarget + %5.2f (=%5.2f) [EMERGENCY CUTOFF]", temperatureCurrent, temperatureMaxOvershoot, temperatureTarget);
+      error("[EMERGENCY CUTOFF] temperatureCurrent (=%5.2f) > temperatureTarget + %5.2f (=%5.2f) [EMERGENCY CUTOFF]", temperatureCurrent, temperatureOver, temperatureTarget);
     }
   }
 }
@@ -99,15 +107,15 @@ bool setDouble(const char *name, double *destinationPtr, double min, double max)
 
 bool patrix_command(char *first) {
   bool result = false;
-  if (strcmp(first, "over") == 0) {
-    result = setDouble("over", &temperatureMaxOvershoot, 0, 20);
-  } else if (strcmp(first, "target") == 0) {
+  if (strcmp(first, "over") == 0 || strcmp(first, "o") == 0) {
+    result = setDouble("over", &temperatureOver, 0, 20);
+  } else if (strcmp(first, "target") == 0 || strcmp(first, "t") == 0) {
     result = setDouble("target", &temperatureTarget, -10, 60);
-  } else if (strcmp(first, "p") == 0) {
+  } else if (strcmp(first, "proportional") == 0 || strcmp(first, "p") == 0) {
     result = setDouble("p", &proportional, NAN, NAN);
-  } else if (strcmp(first, "i") == 0) {
+  } else if (strcmp(first, "integral") == 0 || strcmp(first, "i") == 0) {
     result = setDouble("i", &integral, NAN, NAN);
-  } else if (strcmp(first, "d") == 0) {
+  } else if (strcmp(first, "derivative") == 0 || strcmp(first, "d") == 0) {
     result = setDouble("d", &derivative, NAN, NAN);
   }
   if (result) {
@@ -116,11 +124,13 @@ bool patrix_command(char *first) {
   return result;
 }
 
-void configLoad() {
-  proportional = configGetDouble("p", 3000);
-  integral = configGetDouble("i", 10);
-  derivative = configGetDouble("d", 0);
-  temperatureTarget = configGetDouble("target", 31);
-  temperatureMaxOvershoot = configGetDouble("over", 5);
+void configLoaded() {
+  proportional = configGetDouble("p", PID_DEFAULT_P);
+  integral = configGetDouble("i", PID_DEFAULT_I);
+  derivative = configGetDouble("d", PID_DEFAULT_D);
+  temperatureTarget = configGetDouble("target", PID_DEFAULT_TARGET);
+  temperatureOver = configGetDouble("over", PID_DEFAULT_OVER);
   pid.setCoefficients(proportional, integral, derivative);
-}
+}
+
+#endif

src/Test.cpp

@@ -0,0 +1,23 @@
+#if defined(TEST8266) || defined(TEST32)
+
+#include <Patrix.h>
+#include "config.h"
+
+void patrixSetup() {
+
+}
+
+void patrixLoop() {
+
+}
+
+void configLoaded() {
+
+}
+
+bool patrix_command(char *first) {
+  return false;
+}
+
+
+#endif