gatewayTransportSend

lib/MySensors/examples/BatteryPoweredSensor/BatteryPoweredSensor.ino

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+/*
+ * The MySensors Arduino library handles the wireless radio link and protocol
+ * between your home built sensors/actuators and HA controller of choice.
+ * The sensors forms a self healing radio network with optional repeaters. Each
+ * repeater and gateway builds a routing tables in EEPROM which keeps track of the
+ * network topology allowing messages to be routed to nodes.
+ *
+ * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
+ * Copyright (C) 2013-2019 Sensnology AB
+ * Full contributor list: https://github.com/mysensors/MySensors/graphs/contributors
+ *
+ * Documentation: http://www.mysensors.org
+ * Support Forum: http://forum.mysensors.org
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ *******************************
+ *
+ * DESCRIPTION
+ *
+ * This is an example that demonstrates how to report the battery level for a sensor
+ * Instructions for measuring battery capacity on A0 are available here:
+ * http://www.mysensors.org/build/battery
+ *
+ */
+
+
+
+// Enable debug prints to serial monitor
+#define MY_DEBUG
+
+// Enable and select radio type attached
+#define MY_RADIO_RF24
+//#define MY_RADIO_NRF5_ESB
+//#define MY_RADIO_RFM69
+//#define MY_RADIO_RFM95
+
+#include <MySensors.h>
+
+int BATTERY_SENSE_PIN = A0;  // select the input pin for the battery sense point
+
+uint32_t SLEEP_TIME = 900000;  // sleep time between reads (seconds * 1000 milliseconds)
+int oldBatteryPcnt = 0;
+
+void setup()
+{
+	// use the 1.1 V internal reference
+#if defined(__AVR_ATmega2560__)
+	analogReference(INTERNAL1V1);
+#else
+	analogReference(INTERNAL);
+#endif
+}
+
+void presentation()
+{
+	// Send the sketch version information to the gateway and Controller
+	sendSketchInfo("Battery Meter", "1.0");
+}
+
+void loop()
+{
+	// get the battery Voltage
+	int sensorValue = analogRead(BATTERY_SENSE_PIN);
+#ifdef MY_DEBUG
+	Serial.println(sensorValue);
+#endif
+
+	// 1M, 470K divider across battery and using internal ADC ref of 1.1V
+	// Sense point is bypassed with 0.1 uF cap to reduce noise at that point
+	// ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
+	// 3.44/1023 = Volts per bit = 0.003363075
+
+	int batteryPcnt = sensorValue / 10;
+
+#ifdef MY_DEBUG
+	float batteryV  = sensorValue * 0.003363075;
+	Serial.print("Battery Voltage: ");
+	Serial.print(batteryV);
+	Serial.println(" V");
+
+	Serial.print("Battery percent: ");
+	Serial.print(batteryPcnt);
+	Serial.println(" %");
+#endif
+
+	if (oldBatteryPcnt != batteryPcnt) {
+		// Power up radio after sleep
+		sendBatteryLevel(batteryPcnt);
+		oldBatteryPcnt = batteryPcnt;
+	}
+	sleep(SLEEP_TIME);
+}