ESP8266 Community Forum

- Wed Dec 24, 2014 9:58 am #5612 ..hehe .. because nRF24L01+ have too small RF power output .. only +0db .. if test my CC1101 with +12db output hen have longer distance than nRF24L01 .. but in CC1101 can set 32kbps speed .. but in nRF min is 250kbps ..

regards ..
ESP8266 if good becasue use standard WiFi security ..

- Wed Dec 24, 2014 10:07 am #5614

node in MESH are in deep sleep mode and are synchronized .. wake up every predefined time and listen or transmit .. WiFi MESH must work exactly same solution how in other low power MESH network..

Its a matter of time. Its possible to remote-wakeup (passive wake-up) at 2.4GHz. It is already tested in 433 and 868MHz. You may look at DASH7 architecture. So, hard time sync may not required.

Of course .. if ESP8266 can't change output power from +20db to (for example +0db or less) then must working in maximum

Even if the Espressif does not provide the API for power consumption, there are some tweaks to control the "RF OP Power to control power consumption"

and what about transfer speed .. for example in nRF24L01+ send 32byte payload in 1Mbit speed then it's take less then 1ms .. but in 11Mbit or 54Mbit .. then can save lots of Tx time ..

I did not find any doc where Espressif mentioned the speed, but its actually slow, may be 2Mbps (as per my testing) and the real data transfer time is less important when dynamic linking/association comes in picture (particularly if we talk about periodic sleep) which is much more than actual data transfer.

- Wed Dec 24, 2014 10:16 am #5615 2Mps? If I can poll all the devices in my house in less than a second I'll be more than happy.

Peter Scargill - http://tech.scargill.net

- Wed Dec 24, 2014 11:05 am #5620 I don't know what I'm doing wrong but I have 2 ESP01 boards, both of which will blow AT code normally, both work perfectly... I blow the files for this - and all I see in either of them is a tiny bit of rubbish on powerup then nothing - no response to AT codes at 115,200 and my mobile phone isn't spotting either of them as access points...

Peter Scargill - http://tech.scargill.net