WemosMotorshield

Introduction

This Plugin in currently only available in the latest mega testing build github

Plugin 079: Wemos Motor shield

It is labeled for Testing. https://www.letscontrolit.com/wiki/index.php/Official_plugin_list

This Plugin is for the Wemos Motorshield which is controlled over the I2C protocol. https://wiki.wemos.cc/products:d1_mini_shields:motor_shield

Hardware

This Plugin works with the Wemos Motorshield.

https://wiki.wemos.cc/_media/products:d1_mini_shields:motor_v1.0.0_1.jpg

Installation

Piotr Bugalski has re-written the firmware for this motorshield, and published it at https://github.com/pbugalski/wemos_motor_shield.

The new firmware is compatible with the old one, minus the hanging and crashing, so it should be perfect for a drop-in replacement.

Here is how you can flash it to your shield.

Preparations:

Short the RTS and the 3V pins on the shield together, like this: https://cdn.hackaday.io/images/3123331492797505129.jpg

And the connect the main pins of the shield to your USB2TTL as follows:

GND ↔ GND

3V3 ↔ 3V3 (or VCC or whatever it is called on your USB2TTL)

D2 ↔ TX

D1 ↔ RX

and connect it to your computer.

Download the motor_shield.bin:

https://cdn.hackaday.io/files/18439788894176/motor_shield.bin

or

https://github.com/pbugalski/wemos_motor_shield

Download STM32Flash from here https://sourceforge.net/projects/stm32flash/files/

Extract and put the above files into a directory

Plug in your USB serial device and make a note of the COM port it uses

Those of you who want to do this using Window's 8/10:

Window Command Prompt cd to the directory

1) 'stm32flash.exe COM9' replace COM9 with your COM port number

2) 'stm32flash.exe -k COM9' This will unlock your shield

3) 'stm32flash.exe -f -v -w motor_shield.bin COM9' This will flash the bin and re-lock the shield.

Then disconnect all the wires (including the RTS pin), connect the shield to your WeMos D1 Mini, and it should work.

see also: https://hackaday.io/project/18439-motor-shield-reprogramming

Software

The Plugin is based on this library: https://github.com/wemos/WEMOS_Motor_Shield_Arduino_Library

ESP Easy

Flash Testing version of ESPeasy in order to used the plugin.

Use the device tab on the ESP Easy webinterface and create a new task by editing one of the available tasks.

Select "Motor - Wemos Motorshield" from the dropdown box.

Enter device name.

Enter the i2c address of you sensor, default value 0x30

Controlling the Motor Shield via HTTP commands

Currently only 2 DC motors are supported. Steppers need to be implemented in future.

You can control the Motorshield by remote http commands send from your Home Automation Controller or any other device that can send http get requests.

Available commands:

Forward

Backward

Stop

---

Command format:

For DC Motors:

 http://<ESP IP address>/control?cmd=WemosMotorShieldCMD,<Motornumber>,<Forward/Backward/Stop>,<Speed>

Motornumber:

A=0, B=1

Examples:

Turn on DC Motor, Direction: Forward. Speed is a value from 0-255

 http://<ESP IP address>/control?cmd=WemosMotorShieldCMD,0,Forward,99

Stopping the DC Motor:

 http://<ESP IP address>/control?cmd=WemosMotorShieldCMD,0,Stop

Controlling the Motor Shield via ESPeasy commands

Go to 'Tools' and enter in command line.

command:

WemosMotorShieldCMD,0,Forward,99

WemosMotorShieldCMD,0,Backward,50

WemosMotorShieldCMD,0,Stop

Rules Example

Events Examples:

DoorOpen

DoorClose

DoorStop

//Events

On DoorOpen Do

WemosMotorShieldCMD 0 Backward 30

EndOn

On DoorClose Do

WemosMotorShieldCMD 0 Forward 30

EndOn

On DoorStop Do

WemosMotorShieldCMD 0 Stop

EndOn

---

// Timer for all day open door at time if not open

On Clock#Time=All,07:00 do

If [Reed1-open#Switch]!=1

Event,DoorOpen

Else

Event,DoorStop

endif

endon

// Timer for all day close door at time if not closed

On Clock#Time=All,22:00 do

If [Reed2-close#Switch]!=1

Event,DoorClose

Else

Event,DoorStop

endif

endon