Witty Cloud Module Adapter Board

Step 1: Witty Cloud Module Adapter Board

I often experiment with a Witty-Cloud module.

The module consists of two interconnected boards. The lower one serves as a USB interface for programming. The upper contains the ESP8266 with micro-USB as power supply.

Step 2: Board Detail

What is in the detail on the two boards on it, is to be seen clearly in the scheme.

Step 3: Adapter

During the development phase of a program, the upper module is to be repeatedly disconnected and, e.g. to put on a breadboard with the periphery. To avoid this I have inserted an adapter in between.

This adapter is a double side PCB with female pin header. The pins of the left are connected 1 to 1. The pins in the right female connector as well. In the photos, the style and layout are good to see.

Step 4: Temperature / Humidity Logger

Now I can plug the peripherals directly and it separates the two boards. The figure shows the hardware for a temperature / humidity logger.

Step 5: Parts

1 piece Double Side Prototype Universal PCB Circuit Board for DIY Soldering 20x14

2 pcs 2.54MM 8Pin 10MM Long Needle Female Pin Strip Stackable Header

2 pcs 2.54MM 8Pin Single Row Female Pitch Header Socket Connector

Comments

[tannenba]

why not just remove the headers on the board and put stacking headers in?

[sweavo]

I just did this tonight and it's great. The serial board can stay in my breadboard for prototyping and writing firmware, then I can unplug and put the top board in my applicatoin enclosure when it's done.

[transmitreceive]

Hi there and sorry to disturb. Can someone explain what those two 'crossed' transistors connected to RESET and FLASH on the interface board do?

[swancd]

To flash firmware to the esp8266 gpio0 is held low during reset (or power-up). Those transistors allow the ch340 to do this so programming can be automatic with no button pressing needed.