[Training Camp] Lichuang EAD Lantern +512013A

On November 23, 2020, Lichuang EDA and Tuya IoT training camp was held.

## Introduction

* Production of IoT RGB lamps based on Lichuang training camp
* Tuya specific distribution network information: [https://auth.tuya.com/?from=https://www.tuya.com/cn/&_source=cbc30f99f7a6c4aebca6755c2fab437f ](https://auth.tuya.com/?from=https://www.tuya.com/cn/&_source=cbc30f99f7a6c4aebca6755c2fab437f) (Contains detailed development documents)

## Hardware Design

* Internet of Things Module: Tuya WB3S module
* The model of RGB lantern is: MHPA3528RGBCT
* Linear voltage regulator adopts: AMS1117-3.3
* Power supply mode: Type-c, voltage is 5V

## Functional planning

* Use surface development plan to realize the most basic PWM of RGB lantern The control
* app adopts Tuya’s public version app template

## Actual picture

* pcb
![M~HD_6KHMS6@7L4B.jpg] ![YTU17SYU4~PS`{PO5S4AN2J.jpg] * app interface
![~OsSZ)GDVX7RY8H(MIQ.jpg ]
## Problem

* The RGB light is very hot. The resistor was soldered wrong, and it has improved by replacing it with a 1K one.
* The distribution network of WB3S is very slow. It will be better if you need to turn on the GPS.
* This is because the firmware cannot be changed. ? ?
* The interface and name of the APP do not match my configuration on Tuya. I really don’t understand why
* WB3S has dual mode of wifi and Bluetooth. How can I use Bluetooth to control it offline?