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elec:esp8266:wifinfo

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# WifInfo

## Overview

A few months ago, I came across a project called Wifinfo. It's a small board, based on an ESP8266, which retrieves information from the French power meters and displays them, or sends them across the network. The PCB was cheap, and I though I could use one, so I built some boards ! Turns out, I can't, since the telemetry option is disabled in my power meter…

## Hardware

### PCB

I uploaded the files on OSHPark and also shared them, so anyone can easily order them: [OSH Park](https://oshpark.com/shared_projects/Rjzd7tY7)

### BoM

Part(s) ref on design Qty Name Doc Supplier SupplierRef
Resistors
R1, R2, R4, R5, R6, R7, R8 7 10K 0603 SMD Resistor N/A Mouser 667-ERJ-3GEYJ103V
R3, R11, R12 3 4.7K 0603 SMD Resistor N/A Mouser 667-ERJ-3GEYJ472V
R9 1 100K 0603 SMD Resistor N/A Mouser 667-ERJ-3EKF1003V
R10 1 470R 0603 SMD Resistor N/A Mouser 71-CRCW0603J-470-E3
Capacitors
C3, C4, C5 3 100nF 0603 SMD Capacitor N/A Mouser 80-C0603C104K4R
C1, C2 2 10uF 0805 SMD Capacitor N/A Mouser 81-GRM21BC81C106KE5L
LED
LED 1 Red 0603 SMD LED 20mA N/A eBay 20x 0603 R,G,B,Y,O,W
Power
D 1 BAT54C Link Mouser 511-BAT54CWFILMY
U 1 3.3V 250mA LDO Regulator Link Mouser 926-2992IM5-3.3/NOPB
Headers/Sockets
uC
X 1 SMD 8 MHz ceramic oscillator Link Mouser 81-CSTCE8M00G55-R0

### Tools

You need:

- A decent (250mA) 5v PSU, like a phone charger, or a battery. - An USB-Serial adapter, which can easily be sourced from eBay.

## Software

### Tools

The firmware is an Arduino sketch, so you will need:

- The Arduino IDE - The ESP8266 _extension_ for the Arduino IDE - The “ESP8266 Sketch data upload” tool for the Arduino IDE - Some libraries such as:

  1. NeoPixelBus, for ESP8266

### Firmware

Grab the firmware from the LibTeleinfo Github project

### Upload

#### Wiring and process

You need to put a jumper on the board between the TX and TX1 pins, on the three pin header on the right.

Connect your serial Adapter to the board (on the six pins header on the right): RX on TX, TX on RX, GND on GND. I used an external power supply but you can also probably use the 5v pin to power the board.

To put the ESP8266 in _Flash mode_, press the Flash switch, hold it, press the Reset switch, relase Reset, release Flash. Should be ok.

#### Upload the data

#### Upload the firmware

## Links

* [Github project](https://github.com/hallard/WifInfo) Schematic and PCB files * [LibTeleinfo](https://github.com/hallard/LibTeleinfo) Firmware

/home/share/www/redox.ws/wiki/data/attic/elec/esp8266/wifinfo.1454331238.txt.gz · Last modified: 2023/11/24 21:55 (external edit)