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README.md | |
UploadProgram.md |
README.mdUartWiFiBoard
The UartWiFiBoard is designed as asynchronous serial communication via WiFi. This board is based on ESP-WROOM-02(esp8266) chip and will be mainly used for the transparent WiFi-serial bridge. For running standalone, the board has a voltage regulator and some user-interfaces. The UartWiFiBoard is an easy way to connect your board wirelessly to the Internet. If you flash Sample software on this repository, the board works as the transparent WiFi-serial bridge. I made video that is how to use UartWiFiBoard . You can watch it on Youtube.
Some highlights of the UartWiFiBoard:
- Main core: ESP-WROOM-02(ESP8266).
- Voltage regulator(3.3V) with control pin.
- Opto-isolated UART interface(Uart interface circuit accepts 3.3V and 5.0V).
- On board WiFi-microcontroller can use following functions.
- LED1 connected to "IO0" H:OFF L:ON(the sample software indicate WiFi status)
- LED2 connected to "IO2" H:OFF L:ON(the sample software indicate UART activity)
- Control voltage regulator's control pin connected to "IO14" H:Enable L:Disabale(normally)
- Voltage detection circuit(for CN1) connected to "TOUT" with forced low switch(SW2)
- The sample software use this feature due to prevent battery over-discharge and the switch(SW2) behaves like power-off function.
- Measures 40mm x 50mm x 10mm
Repository Contents
- /Hardware - All Eagle design files (.brd, .sch)
- /Software - Software files for this hardware
Description(Pin Interfaces)
CN1(Primarily) Pin Descriptions:
This connector is the supply voltage and input for the voltage detector. - VBAT: Up to 12.0VDC convert to 3.3VDC. - GND: GND.
CN3(Primarily) Pin Descriptions:
This connector is for Flashing a program to WiFi-microcontroller. If you change BOOT MODE, To be selected BOOT MODE before supply voltage. - VCC: Restrictly 3.3VDC. - TX: UART TX. - RX: UART RX. - GND: GND. - BOOT MODE: Connected to "IO0" H:Flash boot(normally) L:UART download
If you are interested in more useful uart module, please see the General Serial Communication Board .
CN2(Secondary) Pin Descriptions:
This connector is for your target boart UART-interface. - VIN: This is the power supply pin with a voltage range of 2.7 to 5.5VDC. - TX: UART TX(Open collector output). - RX: UART RX. - GND: GND.
How to upload program
See this page
License
The repository is released under Creative Commons ShareAlike 4.0 International .
Distributed as-is; no warranty is given.