Device that allows temperature data logging using ESP32/ ESP8266, DHT11 and upload it to Thingspeak.

Main reference ESP32:

• https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/
• https://github.com/mathworks/thingspeak-arduino/blob/master/examples/ESP32/WriteMultipleFields/WriteMultipleFields.ino
• https://www.nadieleczone.com/tutorial-arduino/iot-esp32-thingspeak-menghantar-data-suhu-dan-kelembapan-ke-server/

Reference ESP 8266:

• https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/ -> Make sure you put in the correct pin number! Potential shortcircuit! Label and GPIO will be different.

Reference ESP8266 with DS18B20

• https://github.com/terahurts/ESP8266-DS18B20-Thingspeak/blob/master/ESP8266-DS18B20-Thingspeak.ino WARNING!!!
• Never connect ESP8266 to computer usb AND connect it to a power source. You potentially will fry your computer USB.
• Reconfirm polarity. Breadboard power module MD-102 have a reversed polarity!

NOTES:

• 9V battery is not sufficient to power ESP8266. 9V battery might only able to supply 500mAh. Need a bigger current supply.

Project history below:

Trying to develop a device that allows temperature data logging as simple as possible. Resource available will be a laptop that can standby to record data. Other option will be to upload data to cloud.

Hardware alternatives:

• Microbit Using Makecode Microbit is found to have a limitation of 20s. Another means to circumvent this is to sleep the microbit in between data recording.
• ESP32