{"id":1103,"date":"2019-07-04T10:34:59","date_gmt":"2019-07-04T09:34:59","guid":{"rendered":"http:\/\/www.vancura.cz\/?p=1103"},"modified":"2024-03-28T14:54:07","modified_gmt":"2024-03-28T13:54:07","slug":"lorawan-intro","status":"publish","type":"post","link":"https:\/\/vancura.cz\/wordpress\/lorawan-intro\/","title":{"rendered":"LoRaWAN – DIY node and Gatweay @TTN"},"content":{"rendered":"

Connect your IoT project for free using community-build infrastructure – long range
\n<\/p>\n

LoRa (wiki<\/a>) is a new approach how to „build“ internet. Best from my point of view is fact that you can connect for free – if someone is running gateway close to you. See great community project The Things Netwotk<\/a>.<\/p>\n

Here you can find my notes once building your own LoRaWAN endpoind (node) and LoRaWAN Raspberry Pi-based Gateway.<\/p>\n

1. Build DIY LoRaWAN node (end point)<\/strong><\/p>\n

HW needed : BSFrance LoRa32u4 II Lora Development Board – price cca 15USD – get it at AliExpress<\/a><\/p>\n

 <\/p>\n

\"\"
mde<\/figcaption><\/figure>\n
\"\"
smacap_Bright<\/figcaption><\/figure>\n

Note : some boards need to perform soldering at board to enable Lora – refer to great technical forum for this boards at TTN forum<\/a><\/p>\n

Step 1 : get drivers (Windows only) – https:\/\/github.com\/adafruit\/Adafruit_Windows_Drivers\/releases\/<\/a><\/p>\n

Step 2 : download https:\/\/github.com\/BSFrance\/BSFrance-avr<\/a> and unpdack it into Arduino IDE dir \/Documents\/Arduino\/Hardware<\/p>\n

Step 3 : connect board via USB, in Arduino IDE select menu Tools – Board – list LoRa32u4II and select proper port<\/p>\n

Step 4 : download https:\/\/github.com\/matthijskooijman\/arduino-lmic<\/a> as zip, in Ardiono IDE menu Sketch – Include Lib – From Zip – select downloaded zip<\/p>\n

Step 5 : configure this lib in \/Documents\/Arduino\/libraries\/arduino-lmic-master\/src\/lmic\/config.h – enable debug
\n#define LMIC_DEBUG_LEVEL 1
\n#define LMIC_PRINTF_TO Serial<\/code><\/p>\n

Step 6 : go to TTN web https:\/\/www.thethingsnetwork.org\/<\/a> – register, create new app, create new device, in device settings select activation method ABP for start<\/p>\n

Step 7 : in Adruino IDE – open example sketch in \/Documents\/Arduino\/libraries\/arduino-lmic-master\/examples\/ttn-abp\/ttn-abp.ino<\/p>\n

Step 8 : modify sketch – copy ABP keys from Step 6, you need Network session key NWKSKEY in msb format, application session key APPSKEY in msb and Device Adress DEVADDR (format 0x+number from portal)<\/p>\n

Step 9 : modify sketch – pinning for selected board
\nconst lmic_pinmap lmic_pins = {
\n.nss = 8,
\n.rxtx = LMIC_UNUSED_PIN,
\n.rst = 4,
\n.dio = {\/*dio0*\/ 7, \/*dio1*\/ 5, \/*dio2*\/ LMIC_UNUSED_PIN}
\n};<\/code><\/p>\n

Step 10 : upload code from Arduino IDE into LoraBoard *<\/p>\n

Step 11 : open serial monitor and check activity. You should see similar lines as board is trying to connect to LoRaWAN and send data
\n23:15:06.269 -> Starting
\n23:15:06.269 -> RXMODE_RSSI
\n23:15:06.269 -> 144965: engineUpdate, opmode=0x808
\n23:15:06.269 -> 145933: TXMODE, freq=868100000, len=26, SF=7, BW=125, CR=4\/5, IH=0
\n23:15:06.269 -> Packet queued
\n23:15:07.326 -> 212141: RXMODE_SINGLE, freq=868100000, SF=7, BW=125, CR=4\/5, IH=0
\n<\/code><\/p>\n

Step 12 : Open console at https:\/\/console.thethingsnetwork.org\/applications<\/a> and wait for data comming in. This can take some time, so be patient.<\/p>\n

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* Note: I had big troubles uploading any code into board. It is pretty unstable because boards seeems to disconnect after 15seconds. My workaround: upload simple sketch (like blink.ino from examples) 1st and than upload your actual code. If you have problems doing so, press reset button on board during upload. Good luck.<\/p>\n

2. Build DIY LoRaWAN gateway <\/strong><\/p>\n

HW needed :<\/p>\n