dragonbtv

I don't know. I wish I had attached a PDF version of the programming guide of 1846, please google and read it if it is not there.

The module is driven by an internal MCU in which all juices are sucked out. The UART is not that efficient...

and please modify micphone related diagram to the SA828

please read the PDF file of the module carefully as they are totally diffeientbut at least you are closer to the success as there is a noise responding there. great.

the latest version is on Step 27

You are running an old version of the sketch!The reason for this display issue is declared in the sketch as: oled.println(F("?????????????????????")); //the "?" was modifried in System5x7.h to 0x02,0x00,0x02,0x00,0x02If you do NOT know how to modify the System5x7.h file, please just search and replace these lines with: oled.println(F("---------------------")); There are totally 9 lines in the latest version.Please simply download and run the LATEST version.BTW, there are A LOT of jobs to do to modify the sketch if you are to change to another RF modulePlease rewrite every line starts with "rfSerial." according to the PDF of SA868

BTW, there are A LOT of jobs to do to modify the sketch if you are to change to another RF modulePlease rewrite every line starts with "rfSerial." according to the PDF of SA868

my email address is dragonbtv@gmail.com, please discuss technical topic right here

international shipping is too high, please order your PCB locally by Gerber file

no more change except some SMD sizing

it is on step 27 now

that's a module from diffent compay, you have to modify every line related to Serial and softSerial

step 27

in step 24, BOM of the PCB version

It should be on the last step.

please refer to the main loop section of the latest version, you would find out the way how those USB serials, Bluetooth, module are coordinated on communicating at the same time. BTW, please don't call anybody "dear" beside your wife. :)

The PA of the module is connected to 3.7v Li-battery directly from within the module, and there is no voltage regulator for the PA. please read the PDF file on Step 12

please read Step 22, the detail of external power was talked with photosPDF and Gerber files for PCB can be found and downloaded from Step 22 and Step 25v2.12 and v2.16 are using two layers PCB

email sent

PM me your email and I am to send out the latest sketch of v2.24 first

email sent already with attachments73KM6WZM

PM me your email and I am to send out the latest sketch of v2.24 first

I chatted with the boss when I ordered those modules, every single module design is third-part orders driven. We have to appreciate the manufacturers who made those orders. The module I am using is from the request of a company who designed a GSM cellphone combined with HT for miners.Yes, all DMRs are Motorola compatible one, the cost for the encoder/decoder just hurt their passion...

It is extremely hard to solder the heat sink tube, you have to use special glue...

I will take a few pictures next time I am to glue the heatsink. I am to upload the PCB files of v2.16

July 1st, 2019The project is finished with two v2.20 built, especially the one with heat tube heatsink!There will NOT be a kits sell cause there is not enough people interested.

Jun 26, 2019v2.20 finished:4 layers PCB with over 400 vias, a good heatsink...equipped with 3.7V 1200mAh 503759 Lipo battery and a tiny but strong speaker

I was planned on using thin heat sink tube for the PCB version and they are on the way from China, During the 45 days of waiting, I am designing the v2.20 version with 4 layers copper and over 600 vias and I am sure no extra heatsink is necessary...The full sets of PCB v2.16 were uploaded as PDF files.https://www.ebay.com/itm/50x9x1mm-Copper-Flat-Heat-Pipe-Computers-CPU-Cooling-Heatsink-Diy-Rose-Gold/273372311830?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D58654%26meid%3D6d4f6bdbc78b4f7cba1f4c26cb5b2064%26pid%3D100005%26rk%3D2%26rkt%3D6%26mehot%3Dlo%26sd%3D163145794324%26itm%3D273372311830&_trksid=p2047675.c100005.m1851

Everything is on Amazon and eBay US, I am thinking of prepare kits including SMT PCB without profit if there are more than 10 requests...

05/28/2019 Update: v2.12 PCB version finished06/04/2019 Update: v2.16 PCB version finished

normal soldering skill; one weekend; around $90; multimeter