Show HN: PJON_ASK – Radio multimaster communications bus system for Arduino

by gioscarab • 11 years ago

27 13 11 years ago

gioscarab6• 11 years ago

What you think about it?

You speak a lot about VirtualWire, this is no longer used. It was been replaced with RadioHead. There are no significant feature differences, afaik.

I'll try this out tomorrow, using say 5 Arduinos with 433 MHz radios.

What antennas do you use for the radio modules? We've used quarter-wave monopole of 17.3 cm on both the receiver and transmitter with some success.

gioscarab6• 11 years ago

Hi! My seuggestion is to start with the simplex mode, and then go forward testing with half-duplex (see readme). In any case I would be happy to see you testing it in a complex set up like the one you described!

For the antenna in the readme I suggest a dipole antenna, there you can find all the data. If you would add something or you experienced some problems open a issue or contact me :). Good experimentations.

virtualSatai3• 11 years ago

Internally RadioHead and VirtualWire uses a 4to6 bit en-/de-coding. Their reasoning is that if your payload is either high or low for too long, "for a good DC balance". have you experianced anything related to this? You but in 0b01 padding before each byte, maybe this is enough. Your solution is substantially lower overhead.

gioscarab6• 11 years ago

Thank you for your feedback. I agree with you that it has lower overhead. I also have really great results in terms of range (200 meters through walls and buildings) and data rate compared to VirtualWire!

Show HN: PJON_ASK – Radio multimaster communications bus system for Arduino

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