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ESP8266 & RFM module communication

PostPosted: Mon Aug 03, 2015 5:01 am
by Brian Staal
Hello All.

Hope someone can help me with a question regarding the ESP8266.

I have a product with a RFM73 module implemented, and I would like to communicate with it using a ESP-07 module.
Do any one know if this is possible ? or not ? what could be the limitations here ? frequency or modulasation ?

hope some one is able to ansawer this question

Best regards

Re: ESP8266 & RFM module communication

PostPosted: Tue Aug 04, 2015 5:23 am
by tytower
Someone else will come in with some knowledge on this . My routers wifi is on 2.412Ghz The ESP8266 connects of course and the adaptors use "802.11n" type radio '802.11g" and "802.11b" but I don't know what they are but below are the standards .You would have to look up what type of signal is used and what the protocol is .

There are several specifications in the 802.11 family:

802.11 — applies to wireless LANs and provides 1 or 2 Mbps transmission in the 2.4 GHz band using either frequency hopping spread spectrum (FHSS) or direct sequence spread spectrum (DSSS).
802.11a — an extension to 802.11 that applies to wireless LANs and provides up to 54-Mbps in the 5GHz band. 802.11a uses an orthogonal frequency division multiplexing encoding scheme rather than FHSS or DSSS.
802.11b (also referred to as 802.11 High Rate or Wi-Fi) — an extension to 802.11 that applies to wireless LANS and provides 11 Mbps transmission (with a fallback to 5.5, 2 and 1-Mbps) in the 2.4 GHz band. 802.11b uses only DSSS. 802.11b was a 1999 ratification to the original 802.11 standard, allowing wireless functionality comparable to Ethernet.
802.11e — a wireless draft standard that defines the Quality of Service (QoS) support for LANs, and is an enhancement to the 802.11a and 802.11b wireless LAN (WLAN) specifications. 802.11e adds QoS features and multimedia support to the existing IEEE 802.11b and IEEE 802.11a wireless standards, while maintaining full backward compatibility with these standards.
802.11g — applies to wireless LANs and is used for transmission over short distances at up to 54-Mbps in the 2.4 GHz bands.
802.11n — 802.11n builds upon previous 802.11 standards by adding multiple-input multiple-output (MIMO). The additional transmitter and receiver antennas allow for increased data throughput through spatial multiplexing and increased range by exploiting the spatial diversity through coding schemes like Alamouti coding. The real speed would be 100 Mbit/s (even 250 Mbit/s in PHY level), and so up to 4-5 times faster than 802.11g.



HopeRF RFM73 2.4Ghz Transceiver Module Product Overview: RFM73 is a low-power, high-speed FSK/GFSK transceiver module specifically operating in the world wide ISM industrial, scientific and medical (ISM) radio bands..---Frequency shift keying isn't it?

I don't like your chances .