A new Twizy display project

Firmware 1.3 update (ESP & LCD)
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- now "Ah" value auto swaps to show reku recharging current. In this case, the "Ah" icon contains a flash
- added recharge page. It starts automaticaly during charging, but it can be disabled in settings page
The values showed are customizable, except the sixth value, inside the charging animation, which is fix and shows SOC
ETA is calculated starting from the actual power supplied by the charger, considering the theoric capacity of the battery (nominal capacity, corrected with SOH)
So, ETA is an estimated value, which gives and idea of the remaining charge time, in minutes
- added wi-fi connectivity. Now Twizy o'meter can connect via wi-fi to share data, relaying on a Mqtt broker
- added wi-fi settings page. Here you can enter max four SIDD, with passwords, and select if wi-fi should be enabled during charging and/or during drive
On connect, Twizy o'meter will scan for available ssid and, if one of the four saved ssid is found, it will try to connect to it, starting from the ssid with the higher power
If none of the four saved ssid is found, Twizy o'meter will look for a free ssid (with no authentication password), and try to connect
If neither a free ssid is available, Twizy ometer will scan again the networks after 2 minutes
Although scanning function is coded to be non-blocking, Twizy o'meter could be less responsive than usual during scan / attempts to connect
When conected, the IP address is shown in the wi-fi page. Tap on it, to read the MAC address
- added MQTT settings page. Here you can enter your mqtt account parameters and select the frequency of publishing data (not less than 1 sec)
Without settings mqtt parameters, the wi-fi connection will be unuseful. So, take time to do it
A message in settings page shows the state of mqtt connection (connected/disconnected)
When the connection to the broker is lost, Twizy o'meter will retry to reconnect after 30 seconds
- a very, very, very basic android app is provided to connect, via Mqtt broker, to your Twizy o'meter to read (at the moment) charging values
- added keyboard, to enter values
- added a "condensed" battery info page. You can choose it in settings page, as an alternative to multiple info pages.
- battery power (full capacity in kwh) can be modify in settings page
- range of battery total voltage setted to 46.0-58.8
- range of charger temperature setted to 0.0-70.0
- added power off animation
- some bug fixed (lost the count!). Don't blame me if others are still existing: I had to rewrite a large part of the code to implement wi-fi connection
and I was also forced to change the custom comunication protocol with the display, to handle passing of wi-fi and mqtt parameters. So, some issues could be present