Float values sent in binary format over the air

Move base radio id to MyConfig.h

Author: henrikekblad

libraries/MySensors/MyConfig.h

@@ -8,6 +8,8 @@
 #define RF24_DATARATE 	   RF24_250KBPS   //RF24_250KBPS for 250kbs, RF24_1MBPS for 1Mbps, or RF24_2MBPS for 2Mbps
 #define RF24_PA_LEVEL 	   RF24_PA_MAX    //Sensor PA Level == RF24_PA_MIN=-18dBm, RF24_PA_LOW=-12dBm, RF24_PA_HIGH=-6dBM, and RF24_PA_MAX=0dBm
 #define RF24_PA_LEVEL_GW   RF24_PA_LEVEL  //Gateway PA Level, defaults to Sensor net PA Level.  Tune here if using an amplified nRF2401+ in your gateway.
+#define BASE_RADIO_ID 	   ((uint64_t)0xA8A8E1FC00LL) // This is also act as base value for sensor nodeId addresses. Change this (or channel) if you have more than one sensor network.
+
 
 /***
  * Enable/Disable debug logging

libraries/MySensors/MyMessage.cpp

@@ -80,6 +80,9 @@ char* MyMessage::getString(char *buffer) const {
 			case P_ULONG32:
 				ultoa(ulValue, buffer, 10);
 				break;
+			case P_FLOAT32:
+				dtostrf(fValue,2,fPrecision,buffer);
+				break;
 			case P_CUSTOM:
 				return getStream(buffer);
 				break;
@@ -105,8 +108,15 @@ bool MyMessage::getBool() const {
 	return getInt();
 }
 
-double MyMessage::getDouble() const {
-	return strtod(data, NULL);
+float MyMessage::getFloat() const {
+	switch(miGetPayloadType()) {
+	case P_FLOAT32:
+		return fValue;
+	case P_STRING:
+		return atof(data);
+	default:
+		return 0;
+	}
 }
 
 long MyMessage::getLong() const {
@@ -195,10 +205,11 @@ MyMessage& MyMessage::set(uint8_t value) {
 }
 
 
-MyMessage& MyMessage::set(double value, uint8_t decimals) {
-	dtostrf(value,2,decimals,data);
-	miSetLength(strlen(data));
-	miSetPayloadType(P_STRING);
+MyMessage& MyMessage::set(float value, uint8_t decimals) {
+	miSetLength(5); // 32 bit float + persi
+	miSetPayloadType(P_FLOAT32);
+	fValue=value;
+	fPrecision = decimals;
 	return *this;
 }
 

libraries/MySensors/MyMessage.h

@@ -63,7 +63,7 @@ typedef enum {
 } stream;
 
 typedef enum {
-	P_STRING, P_BYTE, P_INT16, P_UINT16, P_LONG32, P_ULONG32, P_CUSTOM
+	P_STRING, P_BYTE, P_INT16, P_UINT16, P_LONG32, P_ULONG32, P_CUSTOM, P_FLOAT32
 } payload;
 
 
@@ -139,7 +139,7 @@ class MyMessage
 	void* getCustom() const;
 	uint8_t getByte() const;
 	bool getBool() const;
-	double getDouble() const;
+	float getFloat() const;
 	long getLong() const;
 	unsigned long getULong() const;
 	int getInt() const;
@@ -157,7 +157,7 @@ class MyMessage
 	MyMessage& set(void* payload, uint8_t length);
 	MyMessage& set(const char* value);
 	MyMessage& set(uint8_t value);
-	MyMessage& set(double value, uint8_t decimals);
+	MyMessage& set(float value, uint8_t decimals);
 	MyMessage& set(unsigned long value);
 	MyMessage& set(long value);
 	MyMessage& set(unsigned int value);
@@ -192,6 +192,10 @@ struct
 		long lValue;
 		unsigned int uiValue;
 		int iValue;
+		struct {
+			float fValue;
+			uint8_t fPrecision;   // Number of decimals when serializing
+		};
 		char data[MAX_PAYLOAD + 1];
 	} __attribute__((packed));
 #ifdef __cplusplus

libraries/MySensors/MySensor.h

@@ -57,8 +57,6 @@
 #define EEPROM_LOCAL_CONFIG_ADDRESS (EEPROM_FIRMWARE_CRC_ADDRESS+2) // First free address for sketch static configuration
 
 // This is the nodeId for sensor net gateway receiver sketch (where all sensors should send their data).
-// This is also act as base value for sensor nodeId
-#define BASE_RADIO_ID ((uint64_t)0xA8A8E1FC00LL)
 #define GATEWAY_ADDRESS ((uint8_t)0)
 #define BROADCAST_ADDRESS ((uint8_t)0xFF)
 #define TO_ADDR(x) (BASE_RADIO_ID + x)