Temperature Control with Arduinto on NodeMCU

Arduino Settings:

• using Arduino 1.8.12
• set target as NodeMCU 1.0 ESP-12E
• Upload Speed 115200
• CPU Freq. 80MHz
• Flash Size 4MB (FS:2MB, OTA:~1019KB)
• Debug port:disabled
• Debug level:None
• IwIP Variant: v2 Higher Bandwidth
• VTables: Flash
• Exceptions: Legacy
• Erase Flash: Only Sketch
• SSL Support: All SSL ciphers

Flashing:

• connect the micro-USB cable to the NodeMCU and the PC you run Arduino on
• with above settings, just press the upload button on the Arduino software
• in case of trouble, go to Arduino settings and enable verbose output for compile and upload, that usually helps

Harddware:

• supply the NodeMCU with 5V on the Vcc pin
• Have the temperature sensor DS18B20 connected to 3.3V and pin D5
• Have the relais (low = heating on) connected to pin D0

Disclaimer:

• always stay in the same room as the temperature controller
• do not leave the temperature controller alone
• always use heating elements that cannot burn
• be sure that they cannot heat up the environmnt around above what it can handle
• use the heater termostat to ensure a max. acceptable temperature cannot be exceeded
• place the temperature sensor at a place where you expect good represnetative temperature for the whole body you are heating
• always place the sensor in the same air compartement as the heating
• the copyright owners or github cannot take any responsibility for damages, even in the case where the software has a bug

Reporting:

• if you report a bug or a feature request, copy/paste following template into the github issue: ** observation: ** expected behaviour: ** difference behaviour: ** mitigation: ** proposed solution: <please propose how to solve the problem, point me to a pull request or branch> ** hardware description: <please provide relevant hardware description, at minimum arduino platform, sensor type, and a screenshot of the web interface when the problem appears>

Usage:

• start the Arduino
• connect to the WIFI AP of the Arduino called "temp-ctl", find the password in the code, you may want to edit it (around line 239)
• open the web browser at http://192.168.236.1/ and press the refresh button to refresh the screen
• there will be a 30 second delay before the Arduino switches the realy on, verify on the web i/f and with your ovens
• the oven will stop after 16 hours @ 60 ÂC, you can change that code, but be aware of memory consequences
• the temp courve drawing will stop after the chart is full
• when done, you can push the refresh button a last time on the web i/f, then edit the fields with free values you need for your documentation
• then print the page
• refreshing will show the example values again

Limitations:

• a power reset will reset the memory, you start anew
• you cannot change any parameters via the web interface