I have a Arduino mega running lights and a time in system I have 4 sets of sensors is it possible to put a arduino micro at each set of sensors to send a signal to the mega can I use one rf receiver on the mega and transmitters at each nano to send signals back the mega or should there be a better solution
I have a Arduino mega running lights and a time in system I have 4 sets of sensors is it possible to put a arduino micro at each set of sensors to send a signal to the mega can I use one rf receiver on the mega and transmitters at each nano to send signals back the mega or should there be a better solution
What you could use is some punctuation and capital letters at the start of sentences.
You can't wirelessly send signals. You can wirelessly send data. The amount of data, the distance to send the data, and the amount of work you are willing to do to make sure the data gets through determines which RF system to use, and how much it will cost.
The range would be about 135 foot max. All I really need to do is is send a letter or something back to me mega to signal that the sensors was tripped. I would have 2 sensors per micro so I could send something like an a for the first. Then a b for the second and so on till the end
Have a look at this Simple nRF24L01+ Tutorial.
Wireless problems can be very difficult to debug so get the wireless part working on its own before you start adding any other features.
The examples are as simple as I could make them and they have worked for other Forum members. If you get stuck it will be easier to help with code that I am familiar with. Start by getting the first example to work
It includes an example for a master and 2 slaves that can easily be extended to a larger number of slaves.
...R
Would rf or Bluetooth be better.
read the bottom half of my signature line
first step in the design process: ask yourself "what problem am I solving?" if you can answer that question concisely and precisely, everything after that is just technique.
my project: the Remote Property Perimeter Monitor. a visitor and incursion annunciator for large properties. a burglar alarm optimized for acreage.
my aggravation: I could set up a sensor out by the highway that sends a signal when it detects motion. I could send it only when necessary. This system could fail, and send me nothing, rendering all this effort useless exactly when it is needed.
I need to know that the system is working. I need to have each remote station in the system send a continuous stream of data as a heartbeat for the system, and switch to sending a "Zone X Sensor" message when motion is detected
my solution ( in the soldering this to that stage ):
TX end: a weather sensor; SPI, I2C, digital or analog. Not serial because the HC12 needs that. the motion sensor takes up one digital pin on the > NANO > Serial > HC-12 > ( the sky )
RX end: HC-12 > NANO > one digital pin to trigger the RPPM when a sensor speaks up, weather data from Serial to I2C.
about that one receiver thing: what problem are you solving? can you take the time to reprogram the receiver over and over, can you use a scanner of the Bearcat variety to scan through the frequencies? or do you need continuous coverage of all frequencies?
my situation requires one antenna pointed down the driveway, a second antenna pointed down the west property line, et cetera. two TX radios in line on one antenna. one radio at each location, one weather sensor, continuous coverage of all sensors. high gain receiving antennas so the sending antennas remain unobtrusive. a diplexer splits the antenna outputs to two RX NANO / HC-12 systems.
first step: read "How to use this forum"
second step: check out the Project Hub and see what has been done similar to what you want done
optional second step enhancement: check out cactus.io to see what an ambitious clued in crew got done.
third step: refine your problem statement. if you can not describe your problem well to others you do not understand it well yourself
Mikeh23:
Would rf or Bluetooth be better.
Bluetooth is RF
...R