Add oil pressure sensor

src/primary-esp32/main.cpp

@@ -15,7 +15,7 @@ that's been bundled out into its own FreeRTOS module (using the ESP IDF librarie
 
 #define MOTOR_STATUS_UPDATE_PERIOD_MS  500
 #define WHEEL_STATUS_UPDATE_PERIOD_MS  1000
-#define BIN_STATUS_UPDATE_PERIOD_MS    3000
+#define BIN_STATUS_UPDATE_PERIOD_MS    3000 // also includes oil pressure sensor
 #define PIPE_PRESSURE_UPDATE_PERIOD_MS 2000
 #define HEARTBEAT_PERIOD_MS            1000
 
@@ -47,6 +47,8 @@ void setup() {
     pinMode(GPIO_BIN2_EMPTY, INPUT);
     pinMode(GPIO_BIN3_EMPTY, INPUT);
 
+    pinMode(GPIO_OIL_PRESSURE, INPUT);
+
     i2c_comms_setup();
     wheel_speed_setup();
     bin_level_setup();
@@ -336,6 +338,9 @@ void loop() {
 
         sprintf(msg_buffer, "%lu %d %.2f", now, digitalRead(GPIO_BIN3_EMPTY), get_bin_level(BIN_3));
         mqtt_client.publish("airseeder/status/bin3", msg_buffer, true);
+
+        sprintf(msg_buffer, "%lu %d", now, digitalRead(GPIO_OIL_PRESSURE));
+        mqtt_client.publish("airseeder/status/oilpressure", msg_buffer, true);
     }
 
     // Periodically publish the heartbeat