Maverick.bbq

Display charts and live cook data from your barbecue on the web. This program requires a specific digital thermometer: The Maverick ET-732. This also requires some specific hardware. You can use whatever microcomputer you like, this was developed on a Raspberry Pi Zero W and a 433 MHz radio frequency receiver module.

Features

• Charts
• Cook stats
• Email alerts
• Push alerts (with Pushover account)
• Fahrenheit or Celsius support
• Custom chart colors

Preview

Installation

Software:
Web server: nginx
Database: sqlite3
Interface: php7-fpm
433mhz sniffer/parser: C Email alerts: php-curl

Hardware:
Raspberry Pi 433 MHz radio frequency receiver

GPIO Pinout (physical pin numbers):
2 (5v) - to 5v pin on receiver
34 (GND) - to GND on receiver
31 (BCM15) - to DATA on receiver

Install steps as of January 7, 2024:

1. sudo apt install git
2. git clone https://github.com/produktive/Maverick.bbq
3. Install PIGPIO (see http://abyz.me.uk/rpi/pigpio/download.html)
   c. wget abyz.me.uk/rpi/pigpio/pigpio.zip
   d. unzip pigpio.zip
   e. cd PIGPIO
   f. make
   g. sudo make install
4. sudo apt install nginx libsqlite3-dev sqlite3 php-fpm php-curl
5. Configure for nginx: either paste from bbq/maverick.bbq or simply:
   sudo cp ~/Maverick.bbq/bbq/maverick.bbq /etc/nginx/sites-available/default
6. Copy maverick html files to nginx web root
   a. cd
   b. sudo cp -RT Maverick.bbq/ /var/www/
7. Create the database
   a. cd ~/Maverick.bbq/bbq
   b. sudo sqlite3 -init ./db.script the.db
   c. .fullschema to verify the db
   d. .quit to exit
8. Build the maverick executable
   a. sudo gcc -o maverick maverick.c -lpigpio -lsqlite3
9. Enable nginx user www-data to execute and kill maverick executable
   a. sudo visudo
   b. Add www-data ALL=(ALL) NOPASSWD: /var/www/bbq/maverick.sh, /bin/kill as last line
10. Set ownership/permissions on /var/www/html and /var/www/bbq directory and contents
    a. sudo chown -R $USER:www-data /var/www/bbq
    b. sudo chown -R $USER:www-data /var/www/html
11. Enter IP/hostname of your Raspberry Pi in a web browser. Login with default password password and change it after login.

Notes

Only Gmail has been tested with the email alerts since I don't have accounts with the other providers. If you use a different provider and it doesn't work, create a pull request and I will investigate it.

Contributions and improvements are welcome.