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LoraWan TTN device libraries, which one to use?

For the device side, if you search on arduino library manager, you will found a lot of libs with very similar names, arduino LMIC, LMIC arduino, lorawan LMIC...etc. if you look on git, there are plenty more...very confusing... I found this good discussion on TTN forum, it gives a clear view of available ones, and their stories, differences.(2020/10/14)   https://www.thethingsnetwork.org/forum/t/overview-of-lorawan-libraries-howto/24692 Currently there are 2 major parents of this kind of libraries: 1. LMiC from IBM   ‘LoRa MAC in C’   , which is a very old one. 2. Semtech LoRaMac-node  the complication:  1. LMIC has been ported to different frameworks. 2. on arduino, the lib mustly work with most MCU supported by arduino. But soem are adapted to specified MCU platform and sometimes different Mac chip. 3. Some of this lib is no longer supported, so you need to find the most updated. 4. Lora spec is upgrading, (slowly getting bigger). So not updated lib w...

How many LMIC for arduino are on the net??

I have been trying to work out the TTN in my region which is 923 AS2. spending some time to find out how to make a 1ch gateway, which take only 1ch and 1SF. Now it comes to the node side, most of examples use IBM LMIC and it's variation. IBM LMIC is based on ST MCU, so some porting to arduino IDE. They all have simillar name but with different modification.  and the function to call in arduino are the same, so be very careful to install.(I believe you better have only one on it.) 1. Matthijs Skooij https://github.com/matthijskooijman/arduino-lmic based on LMIC 1.5 providing raw example; used to send lora mac to other, for testing purpose. ttn-abp ttb-otaa No wiki page, but good explaination on readme.md 2. Thomas Telkamp https://github.com/tftelkamp He has 2 git on LMIC, 1. arduino-lmic-v1.5 noted deprecated, and refer reader to Matthijs one.US915/AU915 hybrid mode 2. LoRa-LMIC-1.51 folked from  Forked from  things4u/LoRa-LMIC-1.51  not sure what ...