https://github.com/tbarbette/picdomotic
PIC program for a domotic station controlling temperature sensors, relay and connected to a PC using UART
https://github.com/tbarbette/picdomotic
Last synced: about 2 months ago
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PIC program for a domotic station controlling temperature sensors, relay and connected to a PC using UART
- Host: GitHub
- URL: https://github.com/tbarbette/picdomotic
- Owner: tbarbette
- Created: 2014-12-26T16:04:44.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2014-12-27T10:53:02.000Z (over 10 years ago)
- Last Synced: 2025-02-14T05:29:45.765Z (4 months ago)
- Language: Makefile
- Size: 414 KB
- Stars: 0
- Watchers: 3
- Forks: 1
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
PIC Domotic station
==========
PIC program for a domotic station controlling two temperature sensors, multiple relay, a USB port (for power only) and connected to a PC using UART to receive its instructions.
It uses a PIC18F23K20 but should work on most of them. The PC sends simple commandes through /dev/ttyUSB0 like "A 32" to enable the device 32, or "E 32" to disable it. "T" to get temperature, ... See the source code in main.c.
This is MPLAB X IDE project. The only usefull file is in fact main.c, the remaining is auto-generated, but I include them if someone would want to directly program the binaries, for example.
Technology used
===========
If you're looking for sample code, you may find here how to :
- Use the UART to communicate with a PC (UART is connected to a "uart usb" module very cheap that you can find on ebay) .
- Use the watchdog timer to ensure a device reset if something goes wrong
- Use the ADC to read the temperature given by two LM35
- Use HLVD to jump to do an interrupt and do "something" (blink in my case) if the voltage goes below some threshold
- Use Brown-out to reset device if the voltage goes even below
- Read/write to eeprom
- Control a 5V relay board with a 3.3V relay board using NPN Transistors (when I'll add the schematic though)
The python script used to manage the PIC controller is available at https://github.com/MappaM/monitoring/blob/master/scripts/relay.py and a small HTTP server allowing you to remotely control it is available at https://github.com/MappaM/monitoring/blob/master/scripts/server.py