From 77c6e7ca8b0c66405037ac548af953e3189771dc Mon Sep 17 00:00:00 2001 From: starcalc Date: Sun, 9 Jul 2017 22:43:07 +0200 Subject: [PATCH] Initial commit --- esp-temperature/esp-temperature.ino | 142 ++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) create mode 100644 esp-temperature/esp-temperature.ino diff --git a/esp-temperature/esp-temperature.ino b/esp-temperature/esp-temperature.ino new file mode 100644 index 0000000..794a2c1 --- /dev/null +++ b/esp-temperature/esp-temperature.ino @@ -0,0 +1,142 @@ +// Wemos D1 board, connected to a battery box and a DS18B20 temperature sensor +// + +// For temperature reading +// Libraries needed: +// * OneWire +// * DallasTemperature +// +// Pinout: https://wiki.wemos.cc/products:d1:d1_mini +// D0 = GPIO16 --> Connect D0 to RST for Deep Sleep-Wakeup + +#include +#include + +const char* ssid = "CTDO-IoT"; +const char* password = ""; + +#define DEVICENAME "haus/bad" +#define TOPIC DEVICENAME"/temperature" +#define ONLINETOPIC DEVICENAME"/online" +#define MQTTSERVER IPAddress(195, 160, 169, 11) // raum.ctdo.de: 195.160.169.11 +const int sleepTimeS = 300; // Reduce this value for debugging. Increase if you want more battery life + +#define VCCPIN D7 +#define ONE_WIRE_BUS D6 +#define GNDPIN D5 + +OneWire oneWire(ONE_WIRE_BUS); +DallasTemperature sensors(&oneWire); + +float tempC; + +// For WLAN & MQTT +#include +#include +AsyncMqttClient mqttClient; +uint16_t packetId1Pub; +bool packet1Ack = false; + +bool ready = false; + +char *ftoa( double f, char *a, int precision) +{ + long p[] = {0,10,100,1000,10000,100000,1000000,10000000,100000000}; + + char *ret = a; + long heiltal = (long)f; + itoa(heiltal, a, 10); + while (*a != '\0') a++; + *a++ = '.'; + long desimal = abs((long)((f - heiltal) * p[precision])); + itoa(desimal, a, 10); + return ret; +} + +void onMqttPublish(uint16_t packetId) { + Serial.println("** Publish acknowledged **"); + Serial.print(" packetId: "); + Serial.println(packetId); + // TODO: Only when both packages were acknowledged... + if (packetId == packetId1Pub) { + packet1Ack = true; + } + if (packet1Ack) { + ready = true; + } +} + +void onMqttConnect(bool sessionPresent) { + char buf[7]; + packetId1Pub = mqttClient.publish(TOPIC, 1, true, ftoa(tempC, buf, 2)); +} + + +void setup() { + pinMode(GNDPIN, OUTPUT); + pinMode(VCCPIN, OUTPUT); + digitalWrite(GNDPIN, LOW); + digitalWrite(VCCPIN, HIGH); + Serial.begin(115200); + Serial.println("ESP-Temperature-Reader-and-MQTT-Poster-via-WiFi"); + // Start up the sensors library + sensors.begin(); +} + +void loop() { + // Send the command to get temperature readings + sensors.requestTemperatures(); + + // You can have more than one DS18B20 on the same bus. + // 0 refers to the first IC on the wire + tempC = sensors.getTempCByIndex(0); + + // Connect to WiFi + WiFi.begin(ssid, password); + int timeout = 0; + while (WiFi.status() != WL_CONNECTED) { + timeout++; + if (timeout>20) { + // WIFI isn't available after 10 seconds -> abort mission, mission's a failure + initiateDeepSleep(); + } + delay(500); + Serial.print("."); + } + Serial.println(""); + Serial.println("WiFi connected"); + + // Print the IP address + Serial.println(WiFi.localIP()); + + // Publish result to MQTT + mqttClient.onConnect(onMqttConnect); + mqttClient.onPublish(onMqttPublish); + mqttClient.setServer(MQTTSERVER, 1883); + mqttClient.setKeepAlive(5).setCleanSession(false).setWill(ONLINETOPIC, 2, true, "no"); // .setCredentials("user", "pass").setClientId(DEVICENAME); + Serial.println("Connecting to MQTT..."); + mqttClient.connect(); + + timeout = 0; + while (!ready) { + delay(250); + timeout++; + if (timeout > 40) + { + // MQTT isn't available after 10 seconds -> abort mission, mission's a failure + initiateDeepSleep(); + } + Serial.print("."); + } + Serial.println(""); + + + initiateDeepSleep(); +} + +void initiateDeepSleep() +{ + ESP.deepSleep(sleepTimeS * 1000000); + delay(100); +} +