sensors: gpio command

examples/simple_sensor/SensorMesh.cpp

@@ -545,7 +545,16 @@ void SensorMesh::handleCommand(uint32_t sender_timestamp, char* command, char* r
       Serial.printf("\n");
     }
     reply[0] = 0;
-  } else {
+  } else if (memcmp(command, "gpio ", 4) == 0) { // gpio {value}: write, gpio: read 
+    if (command[4] == ' ') { // it's a write
+      uint32_t val;
+      sscanf(&command[5], "%x", &val);
+      board.setGpio(val);
+      strcpy(reply, "Ok");
+    } else {
+      sprintf(reply, "%x", board.getGpio());
+    }
+  } else{
     _cli.handleCommand(sender_timestamp, command, reply);  // common CLI commands
   }
 }

src/MeshCore.h

@@ -41,6 +41,8 @@ public:
   virtual void onAfterTransmit() { }
   virtual void reboot() = 0;
   virtual void powerOff() { /* no op */ }
+  virtual uint32_t getGpio() { return 0; }
+  virtual void setGpio(uint32_t values) {}
   virtual uint8_t getStartupReason() const = 0;
   virtual bool startOTAUpdate(const char* id, char reply[]) { return false; }   // not supported
 };

variants/rak3x72/target.h

@@ -13,6 +13,12 @@
 
 class RAK3x72Board : public STM32Board {
 public:
+    void begin() override {
+        STM32Board::begin();
+        pinMode(PA0, OUTPUT);
+        pinMode(PA1, OUTPUT);
+    }
+
     const char* getManufacturerName() const override {
         return "RAK 3x72";
     }
@@ -25,6 +31,17 @@ public:
         }
         return ((double)raw) * ADC_MULTIPLIER / 8 / 4096;
     }
+
+    void setGpio(uint32_t values) override {
+        // set led values
+        digitalWrite(PA0, values & 1);
+        digitalWrite(PA1, (values & 2) >> 1);
+    }
+
+    uint32_t getGpio() override {
+        // get led value
+        return (digitalRead(PA1) << 1) | digitalRead(PA0);
+    }
 };
 
 extern RAK3x72Board board;