2023-05-29 Michael/Farris ELRS Sync

Owned by Michael Botros
Last updated: 2024-05-14 by R D
2 min read

@Farris Matar

@Michael Botros

 

What we need to know:

  • Restrictions on antenna (size)

    • Probably not as strict as its on groundstation, but need to confirm anyways

  • Specifics or a better estimate on what range should be

  • Find out current limit for input power

Rough plan for groundstation transmitter:

  • Bluetooth IC or module on PCB: Many options available, low risk/straightforward to implement

  • Microcontroller interfaces between transmitters & bluetooth module to handle protocol - selection must happen after transmitter selection to determine how MCU connects to RX/TX modules

  • Building based on example purely or substituting custom components

    • Potentially replace ESP32 with STM since we are more familiar with STM based boards and config

  • Buy receiver and transmitter modules

  • Design custom bluetooth/wifi module

    • First find a module we can use in case all design does not work (have a backup plan)

  • Design power regulation and interface

    • Use 5V line from telem tower power board

    • Step down 5V to 3.3V using LDO’s to power on board ICs and modules

 

Look into:

TX16 (radio controller)

JR Module

 

 

Next steps:

  • [MB] Examine the range limit of the example IC/module - see how it was tested, if it can be improved w/ beefier antennas (determine factors that affect range)

  • [MB] Look for what other options available for long range RX/TX - see if there’s a more suitable module available

  • [FM] Start looking into stock & availability of bluetooth/wifi modules

  • [FM] Look into how feasible designing the bluetooth module would be

  • [MB] Look at feasibility of designing RX/TX module or buying module

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