add board revision function

library.json

@@ -1,6 +1,6 @@
 {
   "name": "Watchy",
-  "version": "1.4.9",
+  "version": "1.4.10",
   "description": "Watchy - An Open Source E-Paper Watch by SQFMI",
   "authors": [
     {

library.properties

@@ -1,5 +1,5 @@
 name=Watchy
-version=1.4.9
+version=1.4.10
 author=SQFMI
 maintainer=SQFMI
 sentence=Watchy - An Open Source E-Paper Watch by SQFMI

src/Watchy.cpp

@@ -315,9 +315,8 @@ void Watchy::showAbout() {
   display.print("LibVer: ");
   display.println(WATCHY_LIB_VER);
 
-  const char *RTC_HW[3] = {"<UNKNOWN>", "DS3231", "PCF8563"};
-  display.print("RTC: ");
-  display.println(RTC_HW[RTC.rtcType]); // 0 = UNKNOWN, 1 = DS3231, 2 = PCF8563
+  display.print("Rev: v");
+  display.println(getBoardRevision());
 
   display.print("Batt: ");
   float voltage = getBatteryVoltage();
@@ -702,6 +701,31 @@ float Watchy::getBatteryVoltage() {
   }
 }
 
+uint8_t Watchy::getBoardRevision() {
+  esp_chip_info_t chip_info;
+  esp_chip_info(&chip_info);
+  if(chip_info.model == CHIP_ESP32){ //Revision 1.0 - 2.0
+    Wire.beginTransmission(0x68); //v1.0 has DS3231
+    if (Wire.endTransmission() == 0){
+      return 10;
+    }
+    delay(1);
+    Wire.beginTransmission(0x51); //v1.5 and v2.0 have PCF8563
+    if (Wire.endTransmission() == 0){
+        pinMode(35, INPUT);
+        if(digitalRead(35) == 0){
+          return 20; //in rev 2.0, pin 35 is BTN 3 and has a pulldown
+        }else{
+          return 15; //in rev 1.5, pin 35 is the battery ADC
+        }
+    }
+  }
+  if(chip_info.model == CHIP_ESP32S3){ //Revision 3.0
+    return 30;
+  }
+  return -1;
+}
+
 uint16_t Watchy::_readRegister(uint8_t address, uint8_t reg, uint8_t *data,
                                uint16_t len) {
   Wire.beginTransmission(address);

src/Watchy.h

@@ -16,6 +16,7 @@
 #include "BLE.h"
 #include "bma.h"
 #include "config.h"
+#include "esp_chip_info.h"
 
 typedef struct weatherData {
   int8_t temperature;
@@ -56,6 +57,7 @@ public:
   void init(String datetime = "");
   void deepSleep();
   float getBatteryVoltage();
+  uint8_t getBoardRevision();
   void vibMotor(uint8_t intervalMs = 100, uint8_t length = 20);
 
   virtual void handleButtonPress();

src/config.h

@@ -2,7 +2,7 @@
 #define CONFIG_H
 
 // Versioning
-#define WATCHY_LIB_VER "1.4.9"
+#define WATCHY_LIB_VER "1.4.10"
 
 //pins
 #if !defined(ARDUINO_WATCHY_V10) && !defined(ARDUINO_WATCHY_V15) && !defined(ARDUINO_WATCHY_V20)