Range issue between 2 TeensyWiNo

+1 vote
asked Dec 8, 2016 by rdalce (170 points)
reopened Dec 9, 2016 by vandenbo

Hello, I tested communication with the teensyWiNo nodes side by side and it works but I have moved them 30cm apart and the receiver no longer... receives anything. Is there a specific configuration that allows a larger range?

1 Answer

0 votes
answered Dec 9, 2016 by vandenbo (510 points)
edited Dec 9, 2016 by vandenbo

Don't forget to connect an antenna to the TeensyWiNo shield. The shield does not embed an integrated antenna.

There are 3 antenna options:

  • the 18cm UFL pigtail, which ends with a SMA connector: the SMA antenna must be connected
  • a 1/4 wavelength wire (17.3cm for the 433MHz band) soldered to the TeensyWiNo shield
  • a DIY spring antenna made with mono-wired electric cable: 9mm diameter, 7 turns, soldered to the TeensyWiNo shield

See TeensyWiNo antenna tutorial on the website.

You may also set the appropriate txPower and modulation. With the following configuration, a indoor range of 30m can be achieved with the DIY spring antenna

rf22.setTxPower(4);
rf22.setModemConfig(RH_RF22::GFSK_Rb125Fd125);
rf22.setFrequency(434.0, 0.05);

If you use narrow bandwidth such as GFSK_Rb2_4Fd36, a range for 200m can be achieved, even in indoor environments.

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