use power save

temp_sensor/platformio.ini

@@ -15,3 +15,12 @@ framework = arduino
 lib_extra_dirs =
     ../libraries
     ~/Arduino/libraries
+upload_protocol = stk500v1
+; each flag in a new line
+upload_flags =
+    -P$UPLOAD_PORT
+    -b$UPLOAD_SPEED
+
+; edit these lines
+upload_port = /dev/ttyACM0
+upload_speed = 19200

temp_sensor/src/temp_sensor.cpp

@@ -1,16 +1,18 @@
 #include <Arduino.h>
 #include <Tiny.h>
+#include <TinyPower.h>
 #include <SoftwareSerial_Tiny.h>
 
 #define DEBUG 0
+#define SEND_INTERVAL (int)(5*60/8)
 
 // Pins
-#define SENDER 1
+#define SENDER PIN_B4
 #define TEMP_PIN A1
 
 #if DEBUG
-#define RxD 3
-#define TxD 4
+#define RxD PIN_B3
+#define TxD PIN_B4
 SoftwareSerial AttinySerial(RxD, TxD);
 #endif
 
@@ -18,20 +20,28 @@ int readTemp();
 
 TempSensor sensor = TempSensor(TEMP_SENSOR, SENDER);
 
-int counter = 0;
+volatile int counter = 0;
+volatile bool shouldSend = true;
 
 void setup() {
 
 #if DEBUG
 	AttinySerial.begin(9600);
+	AttinySerial.println("starting...");
 #endif
 	sensor.setup();
 	analogReference(INTERNAL);
+
+	TinyPower::setup();
+	TinyPower::enableWdt(WDTO_8S);
 }
 
 void loop() {
-	sensor.sendTemp(readTemp());
-	delay(60000L);
+	if (shouldSend) {
+		shouldSend = false;
+		sensor.sendTemp(readTemp());
+	}
+	TinyPower::sleep();
 }
 
 int readTemp() {
@@ -53,3 +63,14 @@ int readTemp() {
 #endif
 	return roundf(temperatureC * 10);
 }
+
+ISR(PCINT0_vect) {
+}
+
+ISR(WDT_vect) {
+	counter++;
+	if (counter % SEND_INTERVAL == 0) {
+		shouldSend = true;
+		counter = 0;
+	}
+}