What I’ve learnt during the making of the WiFi RC robot using the Arduino ESP8266 WiFi shield

 1. A portable power bank can be used as a power supply for Arduino Uno or the logic circuitry of a robot in general. Only an Arduino cable (USB A to B type) is needed to connect the two devices to each other.

2. There was one time when only one of the two robot wheels spun, the other got stuck. There were even a few cases when both of the wheels didn’t move at all. There may be several factors leading to these situations, but if the motor driver is getting hot, it is definitely due to the shorting between the two motor wires. To prevent this from happening again and potentially damage the motor driver, we need to make sure no motor wire connected to the module is left in the air and should be properly insulated. If the motor driver is heating up, let it cool down before continue using.

Motor's air wires 

3. For the WiFi camera that I mentioned in the previous post, actually I used an application available on both iOS and Android called “Alfred Camera”. The device used as a WiFi camera was directly attached in the front of the robot. Then I used my PC as a viewer by logging in with the same account at the site “alfred.camera”. All I needed to work on left was creating a placeholder in front of the robot for the camera device.