# 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 use them: 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     | [[https://www.mouser.com/Search/ProductDetail.aspx?R=ERJ-3GEYJ103Vvirtualkey66720000virtualkey667-ERJ-3GEYJ103V|667-ERJ-3GEYJ103V]]             |
| R3, R11, R12                              | 3   | 4.7K 0603 SMD Resistor         | N/A       | Mouser     | [[https://www.mouser.com/Search/ProductDetail.aspx?R=ERJ-3GEYJ472Vvirtualkey66720000virtualkey667-ERJ-3GEYJ472V|667-ERJ-3GEYJ472V]]             |
| R9                                        | 1   | 100K 0603 SMD Resistor         | N/A       | Mouser     | [[https://www.mouser.com/Search/ProductDetail.aspx?R=ERJ-3EKF1003Vvirtualkey66720000virtualkey667-ERJ-3EKF1003V|667-ERJ-3EKF1003V]]             |
| R10                                       | 1   | 470R 0603 SMD Resistor         | N/A       | Mouser     | [[https://www.mouser.com/Search/ProductDetail.aspx?R=CRCW0603470RJNEAvirtualkey61300000virtualkey71-CRCW0603J-470-E3|71-CRCW0603J-470-E3]]             |
^ Capacitors ||||||
| C3, C4, C5                                | 3   | 100nF 0603 SMD Capacitor       | N/A       | Mouser     | [[https://www.mouser.com/Search/ProductDetail.aspx?R=C0603C104K4RACTUvirtualkey64600000virtualkey80-C0603C104K4R|80-C0603C104K4R]]          |
| C1, C2                                    | 2   | 10uF 0805 SMD Capacitor        | N/A       | Mouser     | [[https://www.mouser.fr/Search/ProductDetail.aspx?R=GRM21BC81C106KE15Lvirtualkey64800000virtualkey81-GRM21BC81C106KE5L|81-GRM21BC81C106KE5L]]             |
^ LED  ||||||
| LED                                       | 1   | Red 0603 SMD LED 20mA          | N/A       | eBay     | [[http://www.ebay.com/itm/381222660649| 20x 0603 R,G,B,Y,O,W]]             |
^ Power & Signal ||||||
| D1, D2, D3, D4, D5                        | 5   | Diodes schottky 1A 20V         | N/A       | Mouser     | [[https://www.mouser.fr/Search/ProductDetail.aspx?R=STPS140Zvirtualkey51120000virtualkey511-STPS140Z|511-STPS140Z]]             |
| U1                                        | 1   | 3.3V 800mA LDO Regulator       | [[http://|Link]]       | Mouser     | [[http://www.mouser.com/Search/ProductDetail.aspx?R=AZ1117CR-3.3TRG1|621-AZ1117CR-3.3TRG1]] |
| OK1                                       | 1   | Phototransistor                | [[http://|Link]]       | Mouser     | [[https://www.mouser.fr/Search/ProductDetail.aspx?R=LTV-814Svirtualkey57820000virtualkey859-LTV-814S|859-LTV-814S]] |
| Q1                                        | 1   | Mosfet Channel N               | [[http://|Link]]       | Mouser     | [[https://www.mouser.fr/Search/ProductDetail.aspx?R=BSS138virtualkey51210000virtualkey512-BSS138|512-BSS138]] |
^ Headers & Sockets & Switchs ||||||
| Flash, Reset                              | 2   | SMD Tactile switch             | N/A       | Mouser     | [[https://www.mouser.fr/Search/ProductDetail.aspx?R=KMR211NG_LFSvirtualkey61170000virtualkey611-KMR211NGLFS|611-KMR211NGLFS]] |
| PWR,TINFO                                 | 2   | 3.5mm Screw header 1x2         | N/A       | eBay     |  |
^ uC    ||||||
| ESP                                       | 1   | ESP07 or ESP12 module          | [[http://|Link]]       | Aliexpress     |  |

### 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. I used v1.6.7, from [the Arduino website](https://www.arduino.cc/en/Main/Software)
- The ESP8266 _extension_ for the Arduino IDE, from [Github](https://github.com/esp8266/Arduino)
- The "ESP8266 Sketch data upload" tool for the Arduino IDE, from [Github](https://github.com/esp8266/arduino-esp8266fs-plugin/releases/)
- Some libraries such as:
  - NeoPixelBus, for ESP8266. Make sure to fetch a working branch, from [Github](https://github.com/Makuna/NeoPixelBus).
    
    I took a "random" one, and it compiles fine, but the LED doesn't work properly...
  - 

### Firmware

Grab the firmware from the LibTeleinfo Github project, in the `examples/Wifinfo`folder.

There's currently a bug in the index.html file: the [issue](https://github.com/hallard/LibTeleinfo/issues/3) with a _fix_, on Github.

### 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.

Select the __good__ board type and options (the default ones are usually okay).

#### Upload the data

* Load the Wifinfo sketch
* Put the ESP266 in _Flash mode_
* Tools > ESP8266 Sketch Data upload

#### Upload the firmware

* Load the Wifinfo sketch
* Put the ESP266 in _Flash mode_
* Upload sketch


## Links

* [Github project](https://github.com/hallard/WifInfo) Schematic and PCB files
* [LibTeleinfo](https://github.com/hallard/LibTeleinfo) Firmware
* [Wifinfo-related message board](https://community.hallard.me/category/16/wifinfo)