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In my project I have to give only 4-digit number to each device(50+ devices) without any wire. And there will be only one transmitter for all receivers. Which communcation type should I use?

Frequency of requests will be 10 seconds for every device. Range will be maximum 150 meters. And power doesnt important, but 1xAA battery will be great P.S: Cost is imporant for now

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  • \$\begingroup\$ What about range, power consumption, frequency of requests, ... Are we supposed to guess that? Seriously, this is unanswerable. VTC \$\endgroup\$ – dim Oct 29 '16 at 19:14
  • \$\begingroup\$ Sorry for missing information \$\endgroup\$ – Enes Can Çetiner Oct 29 '16 at 19:19
  • \$\begingroup\$ Retracting close vote since you reacted. Still, it's rather broad. \$\endgroup\$ – dim Oct 29 '16 at 19:23
  • \$\begingroup\$ I know but I can't decide and asking for personal experience.Which one is more stable? WiFi ,simple RF or bluetooth? \$\endgroup\$ – Enes Can Çetiner Oct 29 '16 at 19:28
  • \$\begingroup\$ Bluetooth over 150 metres? Really? Simple RF sounds simplest. \$\endgroup\$ – Roger Rowland Oct 29 '16 at 19:40
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So you need a 50-code RF remote control and receiver/decoder. I would start with circuit that uses a Holtek chip, like this: http://www.electroschematics.com/8712/rf-based-wireless-remote-control-system/ but to get enough codes, you would need to add an keyboard encoder chip to the transmitter, and keyboard decoder on the receiver circuit.

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To provide 150 meter coverage, it would be better to use Sub 1 GHz RF modules instead of Bluetooth. I think, TI CC1310 seems like a good start point to handle your problem and comes with simple example to provide you what you need.

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  • \$\begingroup\$ Welcome to the site, can I suggest you take the tour in the help section in order to learn how to use the it. Where possible we try to avoid using external links as stack exchange has no control over when their content will be removed. Try to embed the information in the answer. \$\endgroup\$ – RoyC Sep 12 '17 at 8:20

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