Meshtastic with HT-CT62 module
FROM Paul Hausk - this version by F4GOH
CheapMesh is a pcb arround the HT-CT62 chip by Heltec.
The goal is to get a cheap Meshtastic node with this chip, therefore some corners where cut.
| Reference | Value | Footprint / Description | Qty |
|---|---|---|---|
| R1 | 1k | Resistor_1206 | 1 |
| R2 | 220k | Resistor_1206 | 1 |
| R3 | 100k | Resistor_1206 | 1 |
| R4,R5 | 22 | Resistor_1206 | 2 |
| R6 | 10k | Resistor_1206 | 1 |
| C1,C6 | 47uF | Capacitor_vertical | 2 |
| C2,C3,C4,C5 | 100nF | Capacitor_1206 | 4 |
| U1 | HT-CT62 | Integrated Circuit | 1 |
| U2 | AMS1117-3.3 | Integrated Circuit | 1 |
| D1 | LED | Diode_1206 | 1 |
| BP_MENU | BP | Miscellaneous | 1 |
| GND | POINT TEST | Miscellaneous | 1 |
| J1 | USBCONN2 | Type B female connector | 1 |
| J2 | CONN-SIL3 | Male and strap connector | 1 |
| J3,J11 | CONN-SIL6 | Female connector | 2 |
| J4 | — | As you want | 1 |
| J5 | CONN-SIL5 | Female connector | 1 |
| J6 | OLED | SSD1306 (GND VDD SCL SDA) | 1 |
| J7 | CONN-SIL4 | As you want | 1 |
| J8 | SMA | Female connector | 1 |
| J9 | ANT2.4G | On board antenna | 1 |
| J10 | SIL-100-02 | Miscellaneous | 1 |
| PT1-PT4 | ENTRETOISE | Spacer | 4 |
- Option A: use the onboard antennas
- Option B: use an external antenna with the IPEX connector (and cutting of the onboard lora antenna)
- Option C: use an external antenna with an sma connector (and cutting of the onboard lora antenna)
- Option D: solder on a dipol antenna (and cutting of the onboard lora antenna)
Never connect more than one powersource at a time!!!
- Only via the usb type B
- Via the 3.3V with Serial module current is too low !!! remove jumper !!!
WIP
- Source the the pcb yourself. I recomend JLCPCB to get the pcb created. 5 pcbs should cost 2$ plus shipping and taxes.
- Solder on the components.
Flasher without OLED feature
Use an USB to TTL serial adapter to flash the module
How to compile ? or read complilation_meshtastic_rpi.pdf in firmware directory to install platform.io
change variant.h in meshtastic : firmware/variants/esp32c3/heltec_esp32c3/variant.h
pio run -e heltec-ht62-esp32c3-sx1262Or if platform.io is installed in your PC
pio run -e heltec-ht62-esp32c3-sx1262 -t uploadInstall esptool
pip install esptoolUpdate the firmware (need to flash without OLED feature before)
esptool.py --chip esp32c3 --port /dev/ttyUSB0 --baud 115200 write_flash --flash_mode dio --flash_size=4MB 0x10000 firmware.binCheapMesh by PaulHausK and this other version by F4GOH is licensed under Creative Commons Attribution-ShareAlike 4.0 International
