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LilyGo LoRa Series Quick Start On The Things Network

English | 中文

Index

Required

LoRaWAN End Device: T-Motion S76G

LoRaWAN Gateway: Raspberrypi Model 3B + T-SX1302

raspios: raspios_lite_arm64-2022-01-28

TTN Version: v3.15.1

Run sx1302_hal on the Raspberry Pi

NOTE

The LoRaWAN gateway that has been connected to TTN, you can ignore this section

Deploy sx1302_hal

Execute sx1302_hal.sh on Raspberry Pi to automatically deploy sx1302_hal.

sudo ./sx1302_hal.sh -f eu868
sudo reboot

Get relevant information

pi@raspberrypi:~ $ cat .sx1302_hal/.output
Gateway EUI: B827EBFFFEFC7AF0
Gateway Server address: eu1.cloud.thethings.network
Gateway Server port: 1700

Create a gateway on TTN

  1. Log in to https://console.cloud.thethings.network/

  2. Select the cluster according to the frequency band supported by the gateway. The frequency band supported by T-SX1302 is 868MHZ, here you need to select the Europe1 cluster

    cluster_picker

    ! Warning

    Legacy V2 Console is a server of TTN V2 version, it will be closed in December 2021, it is not recommended to use

  3. Create a gateway

    create_gateways

  4. Configure gateway information

    Fill in the [Gateway EUI] obtained after deploying sx1302_hal (#get related information)

    config_gateway_info

  5. Select frequency，Need to be consistent with the frequency band parameters of sx1302_hal.sh

    slelct_frequenry

Check gateway connection status

Check if the gateway is successfully connected on TTN

gateway_status

Create end device model on TTN

Enter the create Application page

create_app

config_app_info

Create end device

Create a lorawan device, use OTAA to access the network by default

add_end_device

register_end_device

NOTE

DevEUI, AppEUI, AppKey can be selected to generate

LoRaWAN End Device

Firmware Compile

  1. Download Example code
git clone https://github.com/Xinyuan-LilyGO/LilyGo-LoRa-Series.git
  1. Create Arduino project

Go to the LilyGo-LoRa-Series\examples\TTN\TTN_OTTA directory and modify the TTN_OTTA.cpp file to TTN_OTTA.ino

Open TTN_OTTA.ino and configure the project as follows:

board_config

  1. Modify board information

Make the following changes to utilities.h·:

diff --git a/examples/TTN/TTN_OTTA/utilities.h b/examples/TTN/TTN_OTTA/utilities.h
index 2874773..9b8aade 100644
--- a/examples/TTN/TTN_OTTA/utilities.h
+++ b/examples/TTN/TTN_OTTA/utilities.h
@@ -7,7 +7,7 @@
 // #define LILYGO_T3_V1_0
 // #define LILYGO_T3_V1_6
 // #define LILYGO_T3_V2_0
-// #define LILYGO_T_MOTION_S76G
+#define LILYGO_T_MOTION_S76G

 // #define LILYGO_T_MOTION_S78G         //Not support
 /*
@@ -171,12 +171,3 @@
 #else
 #error "For the first use, please define the board version and model in <utilities. h>"
 #endif
  1. Modify LoRaWAN network access information

Fill the DevEUI, AppEUI, AppKey generated on TTN into the loramac.cpp file according to the corresponding byte order:

lorawan_info_modify

Compiled successfully:

build_successfully

Flash Onto The Device

  1. Insert T-Motion S76G into the USB port of the PC

  2. Press and hold the BOOT button, then press the RESET button, and click the upload button in the Arduino IDE

  3. The firmware is successfully burned as follows

    image-20211022100643008

  4. Reconnect T-Motion S76G to the USB port of the PC

Example Output

Use the serial port debugging tool, select the DTR check box, plug the T-Motion S76G into the USB interface of the PC and quickly open the serial port, you can see the debugging information output

serial_output

On TTN, you can see that the data in the MAC payload field is consistent with the data sent in loramac.cpp

image-20211022134750832

Q&A

LMIC error occurs when building T-Motion S76G firmware

The following problems occur because of the incompatibility of the LMIC library version:

loramac.cpp:25:1: error: 'const lmic_pinmap' has no non-static data member named 'rx_level'
   25 | };
      | ^
exit status 1
'const lmic_pinmap' has no non-static data member named 'rx_level'

Make the following modifications to the loramac.cpp file:

diff --git a/examples/TTN/TTN_OTTA/loramac.cpp b/examples/TTN/TTN_OTTA/loramac.cpp
index 896be89..6b39f54 100644
--- a/examples/TTN/TTN_OTTA/loramac.cpp
+++ b/examples/TTN/TTN_OTTA/loramac.cpp
@@ -21,7 +21,7 @@ const lmic_pinmap lmic_pins = {
     .rxtx = RADIO_SWITCH_PIN,
     .rst =  RADIO_RST_PIN,
     .dio = {RADIO_DIO0_PIN, RADIO_DIO1_PIN, RADIO_DIO2_PIN},
-    .rx_level = HIGH
+    //.rx_level = HIGH
 };
 #else
 const lmic_pinmap lmic_pins = {
@@ -217,5 +217,3 @@ void loopLMIC(void)
 {
     os_runloop_once();
 }

Version History

Version Major changes Date Author
1.0.0 Initial release 2021/10/22 liangyy