IoT Motor Firmware

by OpenMYR

Source code for firmware designed to drive various MYR motor controllers with an ESP8266-based platform.

• Software by Brandon Brown and Kyle Berezin (MIT License)
• Hardware design by Chris Adams (CERN Hardware License Version 1.2)

Features

Reconfiguration of the WiFi mode and softAP login is supported via the built-in web server.

Borrows From

• WiFi handler contains demonstration code by Tom Trebisky
• Hardware timer driver (hw_timer.c) (MIT License)
• JSON interpreter JSMN, by Serge (MIT License)

Driver Support

• An array of up to 4 180-degree servo motors
• Stepper motors

Future Support

• DC motor
• Encoded DC Motor
• ... and many more

Building and Flashing

Compiling this project requires the esp-open-sdk, as well as SCons.

• scons flash-quad flashes the WiFi Hobby Servo Controller firmware, rebuilding if necessary
• scons flash-stepper flashes the WiFi Stepper Motor firmware, rebuilding if necessary
• scons builds both versions of the firmware
• scons quad builds the WiFi Hobby Servo Controller firmware
• scons stepper builds the WiFi Stepper Motor firmware
• scons -c cleans all builds
• scons -c quad cleans the WiFi Hobby Servo Controller build
• scons -c stepper cleans the WiFi Stepper Motor build

The "flash-quad" and "flash-servo" commands are intended to be used on Raspberry Pi 2, as the GPIO port can be used to communicate directly with the ESP8266 without the use of a USB device. To use the Pi with the ESP8266, disable serial port login and serial bootup info. The ESP8266 can then be used with the /dev/ttyAMA0 port for both burning and serial communications. For more information, see this guide.