Thank you @EmilyJane I was worried about this actually. ok so for our case since we already have the transceivers, can you please advise how would I go about programming the arduino to transmit and receive the data from my IMU, Barometer, Thermocouples, etc. that are connected to the arduino and send them to our ground station? without the uart communication and using the GPIO is it feasible ?
No, sorry, not feasible.
Yes, it is indeed feasible but it will be very slow and a little complicated.
It can do a parallel to serial conversion so it's half true.
Ok thank you both for your guidance on this.
I'll try to find alternatives, can you advise if it would be better to get transceivers with UART or SPI communication? which ones would be more suitable for out application and easier to program in order to send the data from our sensors? keeping in mind that for the ground station we will use a raspberry pi instead of arduino and code it with python.
Why not use what you have?
I have 1 month and a half to finish this project, and I'm not sure how to do it with GPIO. if you can advise of the approach I can try it.
The baud rate will be about 500 and it will require at least one IC, is that OK.
Again I can't help with RPi code.
Otherwise I'd buy new modules.
yea I think buying a transceiver with UART or SPI will simplify the process for me a lot. however I'm not sure which would be better for my application SPI or UART.
I think most of the modules you will come across will use SPI.
Browse the Adafruit website for modules and parts you could use
Is the following mode suitable:
I've used that SX126X radio for a ground based telemetry project and have no reason to think it wouldn't work for an airborne one.
What will you be connecting it to?
Do you still plan on using the RP2040?
Whilst UART based radio modules can initially seem to be easy to use, you can be limited by what features the UART to radio conversion process provides.
For maximum flexibility I would use SPI based radio modules, then your code can talk direct to the radio module, with maximum flexibility and you can speed things up.
I tried to get a solid idea of what the rocket is to do and I find unexplained "features" just popping up.
" the rocket will NOT have any control surfaces, and our objective is purely scientific (to get data from the launch such as pressure, temperature, altitude, velocity, etc.)."
and then there are servos and valves... what for? Hard to say that there may be lighter alternatives when to-what is a mystery.
That's in the 1st post. In post #41, a camera creeps in. What for?
New needs/features keep appearing and more parts thrown at them. Do you want to cut weight and just do the original plan or is this a class on perfecting featuritis?
How much data do you expect to collect? Raspberry Pi makes a cheap, light, 3.3V 133 MHz dual core controller board named PICO with enough RAM to store a good bit of data. Hint Hint Hint.
If you only needed to make limited short motions like popping a parachute out, a capacitor charged on ground can supply power for that... can ignite a small separation charge or power a coil wound into the rocket shell. It's not like you have steering vanes.
WHY transmit data during flight? Is it necessary as opposed to recovering the rocket and getting the data in?
What DATA is the camera to collect? Is the view a kewl afterthought you can find a way to use? Is the goal to make the rocket reach a lower apogee? After all, adding mass seems to be no concern while adding features and expense is just fine.
If there's radio transmitting serial data, how far will the rocket move in the time it takes to say "Hello World"?
What I see is a discussion over technical details with little regard for goals so have fun with bloat.
yes inside the rocket model we will use the rp2040, and on the ground station will revert back to raspberry pi. I can pair it with a second transceiver correct?
@srnet thank you! this seed studio model can communicate over both, so I'll proceed try to make it work with SPI then
I don't think so. I only seen USB and UART.
Well that leaves me out I have no experience with the RP2040 or Rpi
Got to agree with your general points .............
If your going to use a radio for sending and receiving data, from a rocket, you really need to know how much data you want to send in what time frame and the distances involved.