HC-12 or NRF24L01+PA+LNA module?

Discussion in 'Wireless & RF Design' started by Mozee, Jun 27, 2017.

  1. Mozee

    Thread Starter Member

    Jul 23, 2016
    85
    8
    Hello ACC fellows,

    I would like to create an Arduino controlled wireless relay switching system and sensor monitoring (e.g. humidity and temp. of an equipment) all controlled for my home's computer and I need a long range stable RF connection for approx. a 1Km range. Which is better for me? the HC-12 module or the NRF24L01+PA+LNA module? I do have a very good line of sight for the location so It shouldn't be that hard but I need a stable and reliable connection.

    Thanks in advance.
     
  2. Mozee

    Thread Starter Member

    Jul 23, 2016
    85
    8
    No Ideas?
     
  3. ericgibbs

    Moderator

    Jan 29, 2010
    7,678
    1,547
    hi M,
    The NRF24 will not work up to 1km.
    I experimented with an environmental project along same lines as your plan, I had to scrap the NRF's after trying many suggested ideas.

    I now use the HC12 for remote sensing, it will work upto 1km, 'line of sight'.
    Any physical barriers, walls, trees fences etc, will reduce the reliable operating range.

    I operate the HC12 at the maximum power setting with a 9600 baud rate, it works well upto 100mtrs thru 3 walls of my house, the remote transmitter is located in my garden shed.
    The HC12 transmits Temperature, humidity and the state of 3 PIR's, every 2 seconds
    The local receiver in in doors, I use a Arduino Nano and SD shield for logging the data, alongside the Nano I have a DS3231 RTC for the time/date and indoor temperature,
    A 4 line by 20 char LCD is used as a display.

    Hope this helps.
    Eric
     
    waldosfarm likes this.
  4. Mozee

    Thread Starter Member

    Jul 23, 2016
    85
    8
    Hey Eric, thanks for helping.
    However I've already purchased two NRF24L01+PA+LNA Modules from Amazon and the spects. say that it could reach about 1km "LOS".
    I would like to be able to sent and receive multiple things through them, for example Camera live streaming and to control a water pump remotely (using relay) and get Temp and water level data as well all using the same wireless link. Am I on the right path? or should I select a different setting?
     
  5. ericgibbs

    Moderator

    Jan 29, 2010
    7,678
    1,547
    hi MZ,
    Look thru this NRF24 tutorial, it may help you decide.
    Personally I am not convinced about the range being stated in the documentation, even when the dipole antenna is used.
    Note: the data is sent in packets.

    Read the article in this link, it is about ranging tests for the NRF24
    https://hallard.me/nrf24l01-real-life-range-test/
    E
     
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