I am new to the forum and I am not an Arduino expert, I hope not to ask stupid questions ...
I would like to connect digital sensors to the first Arduino and then read the status of the sensors on the second Arduino, how can I proceed? How far can I reach with communication? What delay will there be on the signals read?
I try to better describe my request, it is about sending Boolean data (or 1 byte) in practice the logic state of two digital signals, a photocell and a reset button from the first to the second Arduino. Minimum operating distance 200 meters, as regards the transmission speed it must be as high as possible, because the photocells command a chronometer where the precision of 0.1 seconds is required. I read from the datascheet of the bluethoot module that the maximum range is 500m meters I hope to reach 200. For now the connections are via cable, for convenience we would like to remove the cables. Another request is the absence of external antennas to the container of the photocell / button, in fact I was thinking of the BLE because it has an integrated antenna. Power supply via 12V lithium battery.
I was afraid I had the wrong hardware, in fact the amount of data to be transmitted is minimal, they must be fast and the distance is not very little, things that usually are not done with the bluethoot.
Do you have any advice on what hardware, maybe cheap, to use?
P.S. Anyone know how long it takes for Arduino BLE to transmit a Byte of data?
Reading datasheet does not always give you the truths. The 200m operating distance may be possible for the hardware when you use another protocol. It will come at the cost of higher power and likely even smaller bandwidth.
For long distance sub-GHz is a better choice. Have a look at LoRa.
That is not a useful question for BLE. BLE uses packets, has connection intervals and some additional protocol overhead. You cannot just send a single byte.
There is a difference between bandwidth and signal delay.
in fact the idea of using two BLEs for this application does not make sense, I thought I would look for some LoRa module, perhaps it is more suitable for this project. If you have any suggestions, they are welcome, thank you all