4 ms·
wifi seems overkill to send on off signals. i would use 433mzh
by z3t4 9y ago
wifi seems overkill to send on off signals. i would use 433mzh
- hb3b 9y agoExcept in the US as this frequency is used for amateur radio.
- simcop2387 9y agoEven through that's true, there's still a wealth of devices that ignore that and use it anyway unfortunately. Mostly cheap devices from other countries that I suspect aren't properly fcc certified despite any claims to the contrary. The wireless doorbell at my last place was on 433mhz.
- luma 9y agoGiven the ESP8266 brings a WiFi radio and 32bit microcontroller for < $2 on your BOM I think this sort of overkill is warranted. 433mhz provides no mechanism for link-layer security which seems irresponsible in this day and age.
- StavrosK 9y agoITEAD do make a 433 MHz version of this stuff, but yes, that's just asking for trouble, given how trivially I can sniff and replay those codes.
- deleted 9y ago[deleted]
- z3t4 9y agoYou are better off with insecure/obscure radio then insecure wifi (no password or wep), and might exposit the device to the Internet which opens the attack range from your neighbors to the whole world. At least you do not have to worry about your 433mzh device becoming part of a bot net.