2017-10-14, 07:47 PM
(2017-10-14, 05:45 PM)JD1 Wrote: Could you post a bit more about the hardware setup and especially the code you are running on the ESP8266 ?
Thanks!
Will do, so far it's a esp8266, 128 x 64 oled display and an ads1115 4 channel adc with an acs712 current sensor.
https://www.sparkfun.com/products/8882
So the plan is to have a box which can log either 4 channels of voltage or voltage and current either way so can log a battery either being charged or discharged. I also have some ttl fet transistors so hoping to be able to control current which would be ideal to make a constant current battery capacity tester.
I have the esp8266 spitting out random numbers via udp at the moment bit I think mqtt would be better all round, easier to control the esp8266 from node red as well. If mqtt is quick enough, should be, just haven't checked yet. Another plus of mqtt is that you can monitor it from anywhere either just on a web based mqtt site or make your own on FRED, the web based node-red site. Liking FRED more and more each day
Just had another thought - is there any kind of mqtt - signalk converter around.? Maybe not, bit of a vague conversion.
But it's all exciting stuff, openplotter on its own is fantastic, add to that node red and for the cost of a few beers what you can do really is quite incredible, amazingly accurate sensors logged and graphed
Ten years ago I started cruising full time and even then it was a good few years before coming across some world charts and laptop charting software. Raspberry pi, Opencpn, arduinos/esp changed all that. With sailoog making it within the reach of so many of us sailors who don't write a thousand lines of programming code before breakfast