Meshtastic DIDDY "ULTRA" GPS + BME280 upgrade kit REMIX

UPFRONT!

I created a Discord channel for  my Thermal vision builds but will add a #meshtastic  channel there as well in case you have questions or problems. Please remain to the meshtastic channel for all sort of questions as all the other channels are ONLY for my thermal builds! 

https://discord.gg/Ce9BJ2DK3j

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Heltec fixed the “long message” and “Bluetooth disconnect” problem with a new hardware Revision, make sure that you order the updated version to avoid problems!

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I got special permission from Gendemik to share my remix! I had to choose “Original, I made it” to publish the remix  as I am not able to link to the original design as its license does not allow sharing and remixing.

AGAIN the BASE DESIGN IS NOT MY CREATION!  I just got permission from Gendemik specifically for my REMIX that allows me to share it!!

Dont miss out to check their other creations and leave them a like for allowing me to share my remix with the world!: Gendemik | Printables.com

You can find the original design this remix is based of here: GDMK Heltec v2/v3 Diddy (Smallest case project) Meshtastic inspired by Gendemik | Download free STL model | Printables.com

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There is no manual/ how to/ guide for the upgrade, you have to know how to do this yourself! 

The “ULTRA” variant of the DIDDY Remix is not meant for everyone but those with the technical knowledge and tools  to build this!  ( its an advanced nerve racking build with lots of wires on very little space!)

It adds a navigation switch for canned messages, notification LED light bar , vibra motor  a BME environmental sensor and an external attachable GPS module,  to the already existing buzzer from the Diddy remix original build. 

The original build you can find here: 

Meshtastic Gendemik "Diddy" T114 Micro Node REMIX by LWC | Download free STL model | Printables.com

A few tipps: 

print with supports from the print bed, all needed supports has been added to the file already. 

Use epoxy to close up all open cavities on the external gps antenna. put some epoxy behind the pogo ping connector on the gps antenna then attach it to the main base so the still soft epoxy  perfectly aligns both pogo pin connectors, I used a clamp and let it cure that way. 

When you use epoxy to fixate the pogo pin connector on the inside of the base, insert the battery and check if it still fits! If you add to much epoxy you will have a hard time getting the battery in! 

Use a side cutter to cut the pins on the magnetic  pogo pin connectors as short as possible.

I used 0.3 wire but for this build I wish i had even thinner one. 

I used quite a bit of uv hardening printer resin for all the components on the pcb I applied with a fine brush hardening it with an uv lamp and also fixed wires in place to take off stress when bending stuff in place. 

I got rid of the  JST GPS connector and directly wired the wires to the solder spots on the board. 

Use the  Ve_ 3V3 pin on the GPS connector for the GPS s VCC as it cuts power when gps is turned off with 3 button presses.

There is a “bug” when you start up the device with the gps enabled and there is no GPS connected there will be “hangs/ freezes” when going through the windows on the T114. This does not happen when you boot up with the gps attached, once it recognized it you can tripple press the prg button to deactivate it and take it off, it then wont have those freezes and hangs. 

Use pliers to cut light bar  at the end where your going to put the SMT LED, I used UV hardening resinn on this as well as its clear transparent and works perfectly to glue the led + wires to the Led bar. 

Part list:

SMA Ipex cable: SMA Female  5CM

5 stücke u. fl/ipx ipex ufl zu sma weibliche männliche Antenne wifi Pigtail Kabel ufl ipex 1,13mm rf Kabel 17cm - AliExpress 13

Vibra motor: 0820

10pcs DC3-5V micro dc vibration motor 0820/0827/0830/0834/1027/1030/1034 für für telefon münze flach motor - AliExpress 502

Much better antenna then the stock one the heltec comes with, select correct frequency for your region: (optional) 

- AliExpress

Mosfet to power buzzer and vibra motor as NR52 output power is to low:  SI2312

200PCS SI2300 SI2301 SI2302 SI2307 SI2312 SS8050 SS8550 MMBD1503A SOT-23 Transistor SMD Triode - AliExpress 502

Buzzer: (8.5x8.5.3mm 3volt)

10 stücke smd Summer 5020 7525 8530 9650 1230 9032 3V 3,6 V 5V magnetischer Mini aktiver passiver Piezo-Summer Lautsprecher elektronisches Kit - AliExpress 502

SMT LED 3 Volt ( choose whatever color you like)

100 teile/los 5 Farben SMD 0805 Led Ultra Bright Rot/Grün/Blau/Gelb/Weiß Water Clear LED Licht Diode - AliExpress 502

Metal belt clip including mouning rivets (2,5x5.5cm):

/20pcs meetee 56x25mm Doppel löcher Metall Feder gürtel Holster Mantel Clip Verschluss Schnallen Zubehör mit 8mm Kappe Bolzen Schrauben - AliExpress 15

GPS Module: 

GPS+BDS Dual-Mode-Modul Flight Control Satellitenpositionierungsnavigator, ATGM336H-Ersatz, für Arduino NEO-M8N NEO-6M - AliExpress 502

BME280 environmental Sensor: 

Offizielles GY-BME280-3.3 BME280 5V 3,3V Digitalsensor Temperatur Luftfeuchtigkeit Luftdrucksensormodul I2C SPI 1,8-5V - AliExpress 502

Magnetic Pogo pin connector: 5 pin straight

1–10 Paar 3A wasserdichter magnetischer Pogo-Pin-Stecker 2 3 4 5 6 7 8 9 11P Pogopin männlich weiblich 2,2 mm federbelastete Gleichstrom-Steckdose - AliExpress 13

Screws (M3 10mm):

M2 m2, 5 m3, 5 m3 m4 m5 pt Pfanne runder Kopf selbst schneidende Holz schraube schwanz geschnittene Phillips Kreuz vertiefter schwarzer verzinkter Stahl - AliExpress 13

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(Optional) Metric Screw and brass heat inserts:

Metric Screws: M2.5, 8mm:

10/50 Stück M1,6 M2 M2,5 M3 M4 M5 M6 M8 schwarzer Stahl der Güteklasse 10,9 ISO7380 Sechskant-Innensechskant-Knopf-Pilz-Inbusschraube - AliExpress 13

Heat inserts: ( M2.5 (OD3.5) 3,5mm length)

M2 M2,5 M3 M4 M5 M6 Messing Hot Melt Einsatz Rändelmutter Gewinde Wärmeform Doppel-Twill-Injektions-Einbettungsmutter für 3D-Drucker - AliExpress 13

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Wiring cable 0.3mm:

10m/15m/20m/40m/50m emaillierten kupfer draht emaillierten draht elektromagnetische spule wicklung draht herstellung elektromagnet kupfer draht - AliExpress 13

Acrylic glas (display protection): 18x28mm

5er Pack durchsichtige Paneele für Bilderrahmen durchsichtige Kunststoff platte Glas Ersatz Display Projekte Lackier dicke 1,0mm - AliExpress 15

Navigation switch for canned messages K2-02 hollowed shell:

Rad Schalter 2/3/4/5/6 Weg Schalter Mini Wavelet Zifferblatt Multi-funktion Reset Micro Schalter Großen kopf/Normalen kopf/keine kopf Rad Schalter - AliExpress 13

Main power Switch:

Heißer 20 stücke 5V 0,3 A Mini Größe Schwarz SPDT Rutsche Schalter für Kleine DIY Power - AliExpress 13

Case screws:  M3 20 pieces  8mm length

M1 m 1,7 m2 m 2,3 m2. 5 m2. 6 m3 m3. 5 m4 m5 schwarz pb Kreuz rundkopf Flat Tail Gewindes ch neids ch rauben für Holz Laptop Hardware - AliExpress 13

Lipo Battery ( 10 pieces but you can find smaller amounts as well): 

10 stücke Liter energie batterie Gute Qulity 3,7 V, 1000 mAH, 803040 Polymer lithium-ion/Li-Ion batterie für SPIELZEUG, POWER BANK, GPS, mp3, mp4 - AliExpress 44

Epoxy sculpt: (or any other suitable epoxy)

ApoxieSculpt 1 Lb. Schwarz, 2 Produkt in 2 Teilen (A & B): Amazon.de: Küche, Haushalt & Wohnen