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6

The SX127x family of chips from Semtech are modems supporting both LoRa and (G)FSK modulations (including ultra-narrow band FSK). Coupled with a microcontroller implementing the relevant stack(s), they are already used for with following IoT network protocols: LoRaWAN, Sigfox, Wireless M-Bus, DASH7 and Symphony Link. They could probably also be used with ...


5

Unfortunately this is not a complete answer, I will update it if I get more information. As for now, based on the Sigfox AT command descriptions. AT$SB=bit[.bit] Send a Bit Status (0 or 1). AT$SF=frame[.bit] Used to send payload data or frame of size 1 to 12 bytes. For example: AT$SF=gghh1234 SB means Status Bit message SF means Sigfox ...


1

It's all documented in the Sigfox device radio specifications. For an uplink: 19 bits preamble 13 bits frame type 2 bits length indicator 1 bit bidirectional frag 1 bit repeated flag 12 bits message counter 32 bits identifier variable length uplink authentication (between 2 and 5 bytes) 16 bits CRC Which gives a total of 112 to 136 bits, 14 to 17 bytes. ...


1

Be aware that with LoRaWAN (and others ISM technologies), you have to follow the local regulation about duty cycle as you will use ISM radio band. If you are at a distance of around 5km, you may need to use a large spreading factor meaning you will spread the data on air, and so use more airtime. In Europe, you have (basically) 1% of air time allow. See ...


1

I did a case study on LoRaWAN in 2015. Since then the community is continuously growing. The case study was about installing one Gateway in our city. I find it one of the best solution because Low power consumption (As a node reports to Gateway, 3 AAA batteries lasts for more than a month) Low cost devices (The Things Uno) Long range wireless network (Up ...


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