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This took about 1.5 hours today to build. I suck at soldering or it probably would have been faster. For influxdb and Grafana, I simply followed the instructions on the respective websites.
I'm thinking I might add some calibration code to the ESP code just to fine tune things a bit, but for now, everything is working.
The Arduino OTA stuff for the ESPs is really great. Makes modifying and testing ESP code so easy!!!
Rob
#!/usr/bin/python
import socket, requests
from subprocess import call
UDP_PORT = 12345
UDP_IP = ""
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind((UDP_IP,UDP_PORT))
print "Listening on UDP port: "+str(UDP_PORT)
while True:
data, addr = sock.recvfrom(1024)
print addr[0],data
if data.find("->"):
influxValueFind = data.find("->")+3
influxValue = data[influxValueFind:influxValueFind+5]
influxLoc = data[data.find("(")+1:data.find(")")]
r=requests.post('http://10.0.1.202:8086/write?db=mydb', 'temperature,host=ESP00000,location=%s value=%s'%(influxLoc,influxValue))
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>
#include <NTPClient.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <ArduinoOTA.h>
// Temperature Stuff
// Set GPIO for DS18B20
#define ONE_WIRE_BUS 2
// OneWire Instance
OneWire oneWire(ONE_WIRE_BUS);
// Use Dallas stuff
DallasTemperature sensors(&oneWire);
// Wifi Stuff
const char *ssid = "*******"; // Your SSID
const char *password = "*******"; // Your Password
WiFiUDP ntpUDP;
IPAddress ipMulti(10, 0, 1, 255); // My network happens to be 10.0.1.XXX, change to whatever your network is
unsigned int portMulti = 12345;
// NTP Client
NTPClient timeClient(ntpUDP, -18000);
// Timer instead of delay (delay messes up OTA)
unsigned long previousMillis = 0;
const long interval = 60000;
void setup() {
Serial.begin(115200);
Serial.println("Initializing");
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);
// Start temperature library
sensors.begin();
// Start Wifi
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
// Start NTP
timeClient.begin();
// All the OTA Stuff
ArduinoOTA.onStart([]() {
Serial.println("Start");
});
ArduinoOTA.onEnd([]() {
Serial.println("\nEnd");
});
ArduinoOTA.onProgress([](unsigned int progress, unsigned int total) {
Serial.printf("Progress: %u%%\r", (progress / (total / 100)));
});
ArduinoOTA.onError([](ota_error_t error) {
Serial.printf("Error[%u]: ", error);
if (error == OTA_AUTH_ERROR) Serial.println("Auth Failed");
else if (error == OTA_BEGIN_ERROR) Serial.println("Begin Failed");
else if (error == OTA_CONNECT_ERROR) Serial.println("Connect Failed");
else if (error == OTA_RECEIVE_ERROR) Serial.println("Receive Failed");
else if (error == OTA_END_ERROR) Serial.println("End Failed");
});
ArduinoOTA.begin();
Serial.println("Ready");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
// Timer code
unsigned long currentMillis = millis();
if (currentMillis - previousMillis > interval) {
previousMillis = currentMillis;
getTimeandTemp();
}
ArduinoOTA.handle();
}
char sendudp(String sendit) {
ntpUDP.beginPacket(ipMulti, portMulti);
ntpUDP.println(sendit);
ntpUDP.endPacket();
}
void getTimeandTemp() {
String str;
timeClient.update();
sensors.requestTemperatures();
str = "(Downstairs) at: " + String(timeClient.getFormattedTime()) + "/" + String(timeClient.getEpochTime()) + " -> " + String(sensors.getTempFByIndex(0)) + "F";// Change the label (Downstairs) to whatever you like
sendudp(str);
}
I did a similar project using a nodemcu 0.9 and DHT11 ... I noticed that the nodemcu gives off a fair amount of heat. I have not put it in an enclosure yet. Does your enclosure affect the temperature reading?
I punched a hole into each side of the enclosure, and the sensor is mounted on the outside of the enclosure with only the leads going into the enclosure (very small slit). As of today (about 11 hours of running), it tracks with my home thermostat, so I'd say that if there is heat, it isn't affecting the reading.
Stefan-Xp
muzi
Capt. Flatus O'Flaherty ☠
Alan Kilian
I'm running the code on a esp-01 512. It runs fine. I'm running the Python code on a RPI3 with Python 2.7 because the print statements looked line Py 2.
The first post the pi gets looks great but the subsequent one bombs with about 4 error messages. One is trying to write to 10.0.1.202:8086.
Anyway; I'll post the full error string if you think you can help.
Update: I commented out all below print addr {0}, data and it works fine.
I'll do my own printing.
Good project ! I'll be integrating it with this program
(https://github.com/engineertype/MAX31855/tree/master/MAX31855/examples/MAX31855x8) running on a esp-12.