I have same article about this, you and other reader can view herehttp://engineer2you.blogspot.com/2016/12/arduino-serial-communication-visual.html
I'm not sure. Let's try
You can use any type DC motor which has encoder! then find PID factor for it.
You need to add one more function to change port name for COM portI think it should has exception error to prevent program error if port name is wrong. Let's try yourself first.
you can use any dc motor which has encoder, then find factor kP kI kD for it.
It's here brohttp://www.dhgate.com/product/1pcs-used-good-japanese-dc-motor-with-encoder/206203142.html
Esp8266 Esp12e WebserverView Instructable »
Almost same with this project, but you need do more:(1) Local web server (in Pi) receive command from user (Android phone)(2) Web server show result (you should use local variable to save result status)Here is another example for light switch where switch status is shown on local webhttp://engineer2you.blogspot.com/2016/06/raspberry-pi-remote-light-switch.html
i didn't get your mean. Here, Pi is sever (admin), android is user
Control Speed Motor PIDView Instructable »
Glad to help you.
Hi Mr. Lazzy,copy the code to file io.phpCode is in this link (Google share) https://drive.google.com/drive/folders/0B1UeJfx4pZ1GU0hta0c4LUpnV1E
Raspberry remote carView Instructable »
3D Printing Class
Dear all, you can also see same instruction about project athttp://engineer2you.blogspot.com/2016/09/raspberry-pi-remote-control-camera.html
Remote control camera by Ra...View Instructable »