📡 MTL-1: High-Power LoRa Node

MTL-1

MTL-1 is a LoRa project based on ESP-32 s3 modules and Ebyte modules such as E22-xxxM30S, E22p-xxxM30S, E220-xxxM30S, E22-xxxM33S Designed to work in MeshCore, Meshtastic, as a client and repeater.

• The project is almost fully compatible with Heltec v3, Heltec WSL3.
• 1A Standalone Linear Li-Ion Battery Charger
• Battery protection lithium-ion/polymer battery
• DC/DC up to 5V
• SMA connector
• GPIO
• 2 button. RESET, BOOT

The device has proven itself well as a repeater and bridge 868/433

MTL-1 is available in three versions

Version 1. (not tested)

Support for Li-ion battery. When powered by USB, the DC Up converter is disconnected, and the e22 module receives a voltage of ~4.6V. When powered by the battery, DC Up is activated, and the e22 module receives a voltage of 5v.

Version 2

Support for Li-ion battery. When powered by USB, the DC Up converter is activated, and the e22 module receives a voltage of 5v. When powered by the battery, DC Up is activated, and the e22 module receives a voltage of 5v.

Version 3

There is no Li-Ion battery support. When powered by USB, the e22 module receives a voltage of ~4.6V.

Power supply

The main power supply of the MTL-1 is provided via the "USB-C" or "X5" connectors, with a voltage of 5V, the recommended power supply current is 1.5...2A

Connecting a 3.7V Li-Ion battery (Version 1&2)

• To connect a battery without protection, use the "X6" connector. Maximum battery charge current 1A

• In the case of using a battery with protection, it is necessary to connect the +battery to the "Battery+" connector "X6", and the -battery to the "-" connector "X5".

Additional IO

Available IO: 2, 3, 4, 5, 6, 7, 19, 20, 38, 39, 40, 41, 42, 45, 46, 47, 48

Connecting the antenna to IPEX

To use IPEX, the "R18" jumper must be removed

Connecting an Oled display (SSD1306)

• G GND
• V +3.3v (Vcc)
• CL i2c-SCL
• D i2c-SDA

Driver CH340

Download driver CH340.exe CH340.zip or Github

Frequency range

150-170Mhz

• e22-170m30s SX1268 30dBm

430Mhz

• e22p-433m30s SX1268 30dBm
• e22-400m30s SX1262, SX1268 30dBm (If S1262 Compatible with Heltec v3, Heltec WSL3)
• e22-400m33s SX1268 33dBm

868-915Mhz

• e22p-868m30s SX1262 31dBm (Compatible with Heltec v3, Heltec WSL3)
• e22p-915m30s SX1262 31dBm (Compatible with Heltec v3, Heltec WSL3)
• e22-900m30s SX1262 30dBm (Compatible with Heltec v3, Heltec WSL3)
• e22-900m33s SX1262 33dBm

Case

• А good sealed casing made of Plastic sewer pipe with a diameter of 40-50mm
• The rainproof modem box VT-BOX9 with the antenna MOXON
• Rainproof case for Bridge Z10-7 158х90х60

Repiters in use

Documentation

• GERBER files
• Pick and Place files
• Interactive scheme BoM
• Datasheet files
• 3d model STEP files
• Mounting plate for case Z10-7 158х90х60
• Instructions RU

MeshCore SPB

• MeshCore SPB
• Telegram MeshCore SPB

Additional description, see the link https://github.com/vy52am0u/MTL