Description

Features

Lower Key Height / More Ergonomic Keyboard
Raised outer ridge to prevent accidental keypresses
Recessed power switch
Alert Buzzer
Textured Grips / Edges
Sunshade for Screen – Also provides protection and prevents accidental keypresses while face down
Recessed antenna mount to reduce overall size and protect antenna
Brass inserts for screws allowing easier reassembly
Attachment loop to hook device to backpack, tree, bike, etc while out exploring
To-Do: Optional replacement backplate including a kickstand when stationary.

Parts Selection for Building:

The links below are sponsored promotions through the Amazon Affiliate program. Purchasing parts through these links ensures part compatibility and greatly helps me to fund further products!
Depending on what you want to build, you may have to pick and choose parts! You may choose to use different parts from different vendors, which will likely be cheaper if you do not need large quantities of screws and such!

Build Notes

The case is designed to fit a Heltec V3 WITHOUT pins! You will need to solder all connections!
The case is designed to fit a CardKB without pin header! You will need to remove the plug and solder directly to the CardKB.

Electronics

Heltec V3 LoRa – https://amzn.to/4cIXtGz
CardKB – https://shop.m5stack.com/products/cardkb-mini-keyboard-programmable-unit-v1-1-mega8a
GT-U7 GPS Module with Ceramic Antenna – https://amzn.to/4rAQO54
2n7000 MOSFET (optional, battery save for GPS) – https://amzn.to/3NiFa0E
3000mah 105050 Battery (10x50x50mm) – https://amzn.to/41Hxt7E
Mini Buzzer (9×5.5mm) – https://amzn.to/4sR5T3X
SPDT Switch (11x6x12mm) – https://amzn.to/4sQVG7f
Whip Antenna (optional) – https://amzn.to/4tozQrT

Hardware

M3 Button Head Screws (8mm) – https://amzn.to/3P8Seq0
Heat Set Threaded Brass Inserts (M3xD5-L4) – https://amzn.to/4lCJ55a

Wiring and Pinout

GPS 

```
GPS VCC → Heltec 3.3v 
```
```
GPS TX  → Heltec GPIO 48
```
```
GPS RX  → Heltec GPIO 47
```
```
GPS GND → MOSFET DRAIN
```
```
MOSFET SOURCE → Heltec GND
```

MOSFET GATE   → Heltec GPIO 26

Buzzer 

```
Buzzer Positive → Heltec GPIO 7 
```
```
Buzzer Negative → Heltec GND  
```

CardKB 

CardKB GND  Pin 1 → Heltec GND

```
CardKB 3.3v Pin 2 → Heltec 3.3V
```

CardKB SDA  Pin 3 → Heltec GPIO 41

CardKB SCL  Pin 4 → Heltec GPIO 42

Battery

Battery Positive → Heltec Positive Battery Terminal (JST-GH 1.25mm)

Battery Negative → Switch → Heltec Negative Battery Terminal (JST-GH 1.25mm)

GPIO pins are tested to work with my device configuration. You may use alternate pins if needed.

Software Configuration – Configure via App

Device Config

```
Buzzer GPIO → Pin 7 
```

Position Config

```
Device GPS        → Enabled
```
```
GPS Receive  GPIO → Pin 48
```
```
GPS Transmit GPIO → Pin 47
```
```
GPS Enable   GPIO → Pin 26 
```

Canned Messages Config

```
Options → Enabled
```
```
Presets → M5 Stack CardKB 
```

External Notification Config

```
Enabled       → True
```
```
Alert Bell    → True
```
```
Alert Message → True
```
```
PWM Buzzer    → True
```
```
Active        → True
```
```
Output GPIO   → Pin 7 
```

Additional information

Weight	N/A
Dimensions	N/A
Kit Type	Download Only, Printed Case, Fully Assembled

PilotMesh Communicator – Standalone Mobile GPS Meshtastic Node

Standalone Portable Meshtastic Node Utilizing Heltec V3 with CardKB Input and GT-U7 GPS Module