Ok thanks ! maybe we can bounce ideas and get some inspiration/help from each others projects
Firstly, im learning arduino as i go, this is really my first proper project with it besides messing with some basic code and circuits a few months ago. Im getting there i think. Ive got decent electrical knowledge but my electronics/coding certainly lacks.
Mine is in the early (testing) stages. Im looking at monitoring individual cell voltages and system component temperatures … via bluetooth (on request), on the lcd screen and via leds. I have 3 leds marked ‘batt , esc , motors’ and an ok led and a fault led.
Through the loop the cell voltages will be displayed on the screen, then the temperatures of the components. If my set parameters are reached for voltages or temps, at the end of the loop the fault led flashes along with the corresponding led for the component (+batt led for low voltage or high temp, or maybe the fault led along with motor led if the motor reaches a certain temp). There is also an error message on the display saying where the problem is.
My future idea was to have the 5110 as a HUD running wirelessly with a nano + bluetooth (multiple bluetooth modules together - im not sure if its possible). Obviously this would be much safer/easier than looking down at the board when riding or even having to stop.
A few points up to now:
-My picture only shows one pot being used to prove the reading works via bluetooth to my phone. It works great, but now i need to work on cells 2+ due to, as you say, needing voltage dividers.
The app im using allows the buttons on screen to be named and also the command they send to be changed. This means i can add up the individual voltages in the arduino and output it, when requested, by clicking a button in the app. This would then tell me the total pack voltage on my phone.
-I have a ds18b20 probe connected to a seperate arduino that im working on as im struggling with correct resolution for the probe reading. Possibly a library mis match im not sure …
Other things im sure but ive just got up (working nights) and havent had 5 cups of coffee yet