Hello guys I just received a project from my local Soccer-Club to be able to print letters on the play field (grass-surface). Mainly for cheering purposes, maybe also for advertisement later on. The idea is pretty straight forward: There are 5 RC-Cars with down facing spray cans, used as printers [-P-] as shown below. Those 5 RC-Cars have all the same specs, this means you can expect one defined speed V.
O O O O O O O O O O -P-|RC-Car-1 O O O O O O -P-|RC-Car-2 O O O O O O -P-|RC-Car-3 O O O O O O -P-|RC-Car-4 O O O O O O O O O O O -P-|RC-Car-5 ----->V (I hope it is obvious that this is going to write "COOL" ^^)
All those "O" 's represent a spray-puff and thus generating letters with this so called 5-Dot-Matrix method. The challenge is to make it wireless (WiFi). I was thinking of getting: 5* ESP8266 v-07 ( I choose v-07 to be able to add an antenna if increased range is needed in the future) 1* Arduino Uno, this one will be carry the code for the pre-selected words. (This can also be carried by RC-Car-3 as so called Leader/Commander) 5* Servos to interact with the spray cans to create those puffs 5* 3.3V Power supplies (Maybe Coin-Cell battery) for the ESP8266's 1* Battery for the Arduino Uno But I am not sure if i can even work with this setup.
I mean I need to be able to connect everything like this (unless someone tells me otherwise):
Spray-can - Servo - ESP8266 = RC-Car-1 Spray-can - Servo - ESP8266 = RC-Car-2 Spray-can - Servo - ESP8266 - Arduino Uno = RC-Car-3 Spray-can - Servo - ESP8266 = RC-Car-4 Spray-can - Servo - ESP8266 = RC-Car-5
As mentioned the Arduino Uno contains the commands for all the other RC-Cars. This means that ESP8266 connected to that Arduino needs to be able to independently control (over WiFi) 5 Servos. Servo from RC-Car-1 & RC-Car-2 & RC-Car-4 & RC-Car-5 & its own servo. Is it even possible to connect one ESP8266 with 4 other ESP8266 over WiFi at the same time? Does it even have to be at the same time? I could perhaps add delays (sleep-times) with experimenting... Is there already a code for 5 Dot-Matix Printing?
Thank you very much for your attention
P.S. : It has to be over WiFi with 5 independent RC-Cars. I know it could make my project way easier if i just added a long stick of PVC-Pipe and made wired connections to each Servo and mount that on rails or something, but this needs to be versatile. :D