Basically I need a low-cost wireless communications module. My requirements would be ~10bit/s , ~2-3m range and up to 1$ for each. Can be receiver and transmitter separately as well. I think it should be working in 433Mhz band.
And suggestions?
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asked Nov 25, 2011 at 15:53
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\$\begingroup\$ electronics.stackexchange.com/questions/3203/… \$\endgroup\$– Toby JaffeyNov 25, 2011 at 22:00
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\$\begingroup\$ cannot use irda. \$\endgroup\$– Arturs VancansNov 26, 2011 at 1:50
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\$\begingroup\$ Why not irda? It meets all that you asked for. \$\endgroup\$– KellenjbNov 26, 2011 at 2:19
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1\$\begingroup\$ There may be things in front/between receiver and transmitter. For example, the transmitter can be under a desk. \$\endgroup\$– Arturs VancansNov 26, 2011 at 21:50
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\$\begingroup\$ @Arturs: You can edit your own questions and include updates like you did with your comment. This way the question is much more easy to understand. \$\endgroup\$– 0x6d64Nov 28, 2011 at 10:14
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3 Answers
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Chipcon/TI CC110L (transceiver), CC113L/CC115L (transmitter/receiver).
Flexible sub-1GHz radio.
Claimed to cost $1 for pair of chips in volume.
A cheap devkit is available.
answered Nov 25, 2011 at 19:54
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\$\begingroup\$ Thanks for bringing these to my attention - amazingly well priced for what they do. Digikey stock them. Look like a nice low cost solution for some applications || You have two down votes for no reason that's obvious - but 3 upvotes including one from me. I gain the impression that there are idio... er ... people wandering around semi randomly down voting with no good cause. Feeling of power perhaps. It takes points off them and you get more points per upvote than a downvote (I think) so all is well. \$\endgroup\$– Russell McMahon ♦Nov 26, 2011 at 6:07
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\$\begingroup\$ It is a good choice for a production line, but the package is too small for prototyping. \$\endgroup\$ Nov 28, 2011 at 13:27
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\$\begingroup\$ @Arturs the devkit is a chip on a PCB, breaking out the SPI bus and power to pins \$\endgroup\$ Nov 28, 2011 at 22:51
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\$\begingroup\$ @Arturs You are unlikely to find what you are looking for at the price you want. As the volume increases, the price will decrease, but typically so will the part footprint size \$\endgroup\$ Dec 2, 2011 at 21:47
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Please see my answer to Low powered wireless doorbell & door open/closed sensor. I think my Wicked Node / Receiver product is basically exactly what you're looking for.
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1\$\begingroup\$ His target price is "up to $1" which seems about an order of magnitude lower than your offering. Your offering may well be good value for what it does, but his spec is much lower than what you offer and he wants a price to match. \$\endgroup\$– Russell McMahon ♦Nov 25, 2011 at 23:57
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\$\begingroup\$ @Russell either I missed that or the price wasn't included in the original question, I'll withdraw my answer. \$\endgroup\$– vicatcuNov 26, 2011 at 5:07
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In the past I have used Hope Microelectronics radio modules which are cheap and worked fine.
Before buying the radio modules from personal experiences I would like to suggest you to think about what in your project is essential. If you would like to just transmit some data over a given distance (develop the logic on application layer) then think about how much your time costs and if it is better to spend time to develop the whole logic from data layer up to application layer or is it better to get more expensive module which already has implemented the protocols for two way communication - multiple acces, packet handling etc. and have more time to focus on your application.
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\$\begingroup\$ these are also not < $1, but I agree they are pretty nice - also agree that it's non-trivial to build a wireless system from the ground up (i.e. starting with a bare radio) \$\endgroup\$– vicatcuNov 28, 2011 at 16:25