Details: Parent Category: WIKI; Category: ESP32APRS_LoRa; Hits: 454

ESP32-DevKit + NiceRF LoRa1278-C1 + GNSS Ai-Thinker GP-02

ESP32 Series of SoCs Embedded, Dual-core 32-bit Microprocessor

Wireless features: Wi-Fi 802.11 b/g/n, Bluetooth v4.2 and Bluetooth LE Specifications
Programming Platforms: Arduino-ide
Clock Frequency: Main Frequency up to 240MHz

Onboard Functions

Flash: 4M
Driver: CP2102
Button: RESET + BOOT
Power Supply Mode: Support USB

Long Range Low Power LoRa Transceiver

LoRa Chip: SX1278
Frequency Range: 150MHz/433MHz/490 MHz(137~525MHz)
Sensitivity up to :-139dBm @Lora
Maximum output power:20dBm(100mW)
Low RX current：10.3mA

How to buy LoRa1278-C1 150Mhz

NiceRF LoRa1278-C1 on AliExpress

APRS_LoRa_VHF_DIY.

Assemble the circuit according to the picture.

APRS_LoRa_VHF_Diagram

Step 1: Download tool&firmware

Download Flash tool software https://www.espressif.com/en/support/download/other-tools
Download Firmware ESP32 for TTGO-LoRa32-V1 and TTGO T-Beam-V1.2 or D.I.Y from ESP32-DevKit (ESP32_V02.zip) at https://github.com/nakhonthai/ESP32APRS_LoRa/releases
Extract the file EXP32_V02.zip to drive,You can see file partitions.bin,bootloader.bin,boot_app0.bin,firmware.bin(TTGO_LoRa32V1.bin)

Step 2: Flash download

Plug the USB cable of board into the computer. (install serial driver)
Open flash tool software (flash_download_tool_xxx.exe) show new small window and select ChipType: ESP32 ,WorkMode: Develop next click [OK].

ESP32_Flash_all

Configure the following values. bootloader.bin 0x1000 partitions.bin 0x8000 boot_app0.bin 0xe000 TTGO_LoRa32V1.bin 0x10000

COM: Select the COMPORT you are using.(Test find port by UnPlug and Plug USB to show new comport)
Click [START] button, wait for status bar to finish.
Push [RESET] button on board to reboot.

Step 3: Access the web service

First install on reboot to automatic factory reset, You can factory reset yourself by pressing and holding the [BOOT] button while the logo is displayed.
Set up Wi-Fi. Using a mobile phone AP mode or router access point. WiFi SSID: APRSTH Password: aprsthnetwork
Board auto connect to mobile phone mode or router AP, You can see IP from DHCP of router or mobile phone.
Open browser in the mobile phone or computer, put address at your http://IP of board and Username: admin Password: admin
You can log in now. You set it up according to how you use it.

Step 4: Modify and change GPIO from diagram

Config GPIO ESP32DevKit to LoRa1278-C1

GPIO26 --> DIO0 ==> IRQ/DIO1 GPIO: 26
GPIO27 --> MOSI ==> MOSI GPIO: 27
GPIO14 --> NRESET ==> RESET GPIO: 14 (Active:Low)
GPIO18 --> NSS ==> NSS/CS GPIO: 18 (Active:Low)
GPIO19 --> MISO ==> MISO GPIO: 19
GPIO5 --> SCK ==> SCLK GPIO: 5
Not Use --> BUSY GPIO: -1
GPIO12 --> GNSS TX ==> RX GPIO: 12 [UART1 Modify], TX GPIO:-1 (Not use)

Goto System tab and click [REBOOT] button.

Mod_Service

Step 5: Config Radio LoRa module

Select Chip Type: SX1278
Frequency: 144.415Mhz, Change the frequency you want. If a warning appears, unable to enter values.Press Apply Change and click Radio tab again.
Band Width: 10.4Khz to 500Khz
Spread Factor: 8
RF Power: -9 to +20dBm

Hint: You can update new firmware next time by use firmware.bin(TTGO_LoRa32V1.bin) put to webservice at [About] tab in group box [Firmware Update]