PilotMesh Communicator - Standalone Meshtastic Node
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Standalone Portable GPS Meshtastic Node Utilizing Heltec V3 with CardKB Input, GT-U7 GPS Module, and alert buzzer
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Updated at source:
Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Public Domain
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.Personally opted to use a folding antenna. Lay device flat, fold antenna up!
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 (9x5.5mm) - https://amzn.to/4sR5T3X
SPDT Switch (11x6x12mm) - https://amzn.to/4sQVG7f
Whip Antenna (optional) - https://amzn.to/4tozQrT
Folding Anteanna (optional) - https://amzn.to/4crx3al
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 Thanks for downloading!
If you have any issues, please contact [email protected] . I greatly appreciate any feedback; each build helps contribute to further improvements.