example added - voltage graph from remote probe#21
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piotrcurious wants to merge 16 commits intoArminJo:masterfrom
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example added - voltage graph from remote probe#21piotrcurious wants to merge 16 commits intoArminJo:masterfrom
piotrcurious wants to merge 16 commits intoArminJo:masterfrom
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another example of simple battery voltage monitor
example node
optimized graph display so after plotting each line goes into the buffer, and on each main loop iteration only a chunk of lines are sent over to bluedisplay. this allows main loop to repeat more often and frequency of event checks is not disrupted only one graph can be buffered for now. this makes display more interactive and reduces bluetooth bandwidth usage as graph data is sent only once per update (usefull for bt/wifi coexistence).
mistake
this ensures whole buffer is drawn in a looping sequence of pseudorandom order
added define to allow compilation either on 3.0.0 or 2.0.6
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added another example to edit array by using touch. |
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this is a working practical example.
esp32 is used as AP
esp8266 is used as a voltage probe.
esp32 uses bluedisplay to display a graph of data collected from esp8266.
node sends packets using UDP multicast so other nodes in the system can see them (there can be more devices using the data, f.e. additional display or relay)
esp32 collects the data from last 24h and displays them in a graph over bluedisplay protocol using bluetooth.
bluetooth and wifi coexistence works with low packet rate and low display update rate. if you increase it too much things start to choke. with full hd display 5 second display update rate and 10 second per packet rates are ok.
The system works completely independent of the internet and it does not disturb wifi of a phone (so one can view the graph while still being connected to wifi and the internet on the phone)
it is just example and more options can be added f.e. to allow rotating the solar panel by pressing buttons , enabling some devices or relays or simply sending commands inside the esp32 AP wifi network (so other devices can hear them)