tMESHrpy- development platform for MeshCore/Meshtastic repeater

tMESHrpt after firmware upload can be used as a repeater-type communicator
for forwarding text messages in the following protocols:

MeshCore
Meshtastic

tMESHrpt is used to extend the range - repeaters connect to each other in a mesh network
and forward the message to the designated recipient.
Thanks to its very high sensitivity, LoRa allows communication with other devices
or repeaters several kilometers away (depending on terrain obstacles)
very low transmission power, comparable to WiFi.
More information about communication can be found in the links to the mentioned protocols.
The device has an energy-saving nRF52840 processor and a LoRa SX1262 modem.
Thanks to the photovoltaic panel and MPPT battery charging system,
it is able to operate completely without an external power source. This is necessary
if the target device is to be used in crisis situations or in undeveloped, wild areas.

Technical data:
Model                                                                     - tMESHrpt with nRF52840, Wio SX1262 modules;
Communication                                                    - LoRa, bluetooth;
LoRa radio band                                                   - 868MHz;
Maximum radio power                                         - 27dBm - permissible ERP power -  500mW for the 869.4-869.65 range and 10% duty cycle;
Radio module sensitivity                                    - up to -146dBm, depending on the transmission parameters; 
LoRa antenna connector                                    - N socket  or plug (male);
Bluetooth antenna                                               - ceramic built-in - range of several meters;
Connectors                                                           - USB-C;
Power                                                                     - 2.5V-4.1V - basket for 2 batteries size 18650 (LiIon 3.7V); 
                                                                                - PV panel 5.5V 250mA, built-in MPPT charger matched to the panel;
Current consumption                                          - 12mA
Charging current and voltage measurement   - YES - integrated  INA219 system;
Battery protection                                               - built-in BMS, cut-off below 2.5V;
Dimensions (without antenna connector)      - 99x99x62mm;
Weight (without battery)                                    - 175g;
Mounting                                                              - 4 x N42 magnets with a total strength of approx. 15kg, safety rope holder.

The base module is best attached to a solid, metal base, horizontal roof flashing.
If possible, the PV panel should be close to the edge of the roof to prevent snow accumulation.
Facing south.
In the case of tall buildings and with public access,
it is necessary to secure it against falling from a height with the short rope.

During operation (battery inserted), the device must have an antenna connected.
Due to the mounting, the housing holds antennas up to approximately 50 cm in length.

Firmware suitable for the model:
Meshcore - ProMicro nrf52 (faketec)
Mestastic - NRF52 Pro-micro DIY
Uploading the selected firmware can be done directly from a browser via the USB-C interface.
A cable with an angled connector is required for uploading.

LEGAL NOTICE:

The device is a development platform intended for experimental, educational, and integration applications. The manufacturer does not provide firmware that implements the user's final radio function.
The board only contains a bootloader that allows for firmware upload via the USB-C interface.
Installation of firmware (e.g., Meshtastic, MeshCore, or other open-source projects) is solely
the user's responsibility.
After uploading one of the mentioned firmwares, the user is required to set the radio
according to the country of residence; in Europe, this is the EU range.

The user is responsible for:

• compliance of the radio configuration with local regulations,
• transmission power,
• channel occupancy,
• band selection and antennas.