#PineDio USB Dongle sends #LoRa Packet to RAKwireless WisBlock ... But received packet is consistently garbled ... As reported by @JF 🤔

https://github.com/lupyuen/lora-sx1262#wisblock-receiver-log

But #LoRa Messages sent by #PineDio Stack BL604 to RAKwireless WisBlock are not garbled ... Even though PineDio Stack and PineDio Dongle are running the same SX1262 Driver Code! 🤔

https://lupyuen.github.io/articles/lorawan#configure-lora-transceiver

#PineDio Dongle sends a 64-byte #LoRa Packet ... But the 64-byte Packet doesn't appear in the dmesg Log for CH341 SPI Driver 🤔

https://github.com/lupyuen/lora-sx1262#pinedio-usb-dmesg-log

Aha! When #PineDio Dongle sends a 29-byte #LoRa Packet to RAKwireless WisBlock ... It's received OK! Anything more will be garbled 🤔

https://github.com/lupyuen/lora-sx1262#wisblock-receiver-log

CH341 doesn't seem to support 32-byte SPI Transfers ... Hope this fixes @JF's #PineDio #LoRa USB Dongle! 👍

https://github.com/lupyuen/lora-sx1262/blob/master/src/sx126x-linux.c#L665-L687

#PineDio USB Dongle shall now receive a #LoRa Message ... From RAKwireless WisBlock

https://github.com/lupyuen/lora-sx1262/blob/master/src/main.c#L74-L119

#PineDio USB Dongle @PINE64 successfully receives 28-byte #LoRa Message ... From RAKwireless WisBlock! 🎉

https://github.com/lupyuen/lora-sx1262#receive-message

Why does #PineDio USB Dongle receive 28-byte #LoRa Messages ... But not longer messages? Because CH341 can only transfer up to 31 bytes of SPI data ... And we need 3 bytes for the SX1262 Command Header

https://github.com/lupyuen/lora-sx1262#receive-message

We now have a Linux Driver for #PineDio #LoRa USB Dongle @PINE64 ... That can transmit 29-byte messages and receive 28-byte messages ... Tested on Pinebook Pro Manjaro Arm64 🎉

https://github.com/lupyuen/lora-sx1262

Building a #LoRa SX1262 Driver for #PineDio USB Adapter @PINE64 ... And testing it on Pinebook Pro ... All shall be explained in this article

https://lupyuen.github.io/articles/usb?1

What's inside #PineDio USB Dongle? CH341 connected to #LoRa SX1262 (over SPI)

https://lupyuen.github.io/articles/usb?2#pinedio-lora-usb-adapter

#PineDio USB Dongle runs the exact same #LoRa SX1262 Driver ... As #PineDio Stack BL604!

https://lupyuen.github.io/articles/usb?3#lora-sx1262-driver-for-pinedio-usb

Someday #PineDio USB Dongle shall support #LoRaWAN and The Things Network (Helium too)

https://lupyuen.github.io/articles/usb?4#lorawan-support

Getting Moderna booster ... And testing #PineDio LoRa USB Dongle on #Pinebook Pro @PINE64

https://lupyuen.github.io/articles/usb?1

What do #PineTime, #PineDio USB and PineDio Stack BL604 have in common? They run on NimBLE Porting Layer!

https://lupyuen.github.io/articles/usb?5#nimble-porting-layer

Here's how we read the #LoRa SX1262 Registers on #PineDio USB Dongle

https://lupyuen.github.io/articles/usb?6#read-sx1262-registers

Here are the #LoRa SX1262 Register Values ... Read by our #PineDio USB Driver

https://lupyuen.github.io/articles/usb?7#run-the-driver

How do we make the same #LoRa SX1262 Driver run on #PineDio USB and PineDio Stack BL604? ... With Layers of Platform Dependent and Independent Code (Like Shrek)

https://lupyuen.github.io/articles/usb?8#source-files-for-linux

How we configure #LoRa Parameters for #PineDio USB

https://lupyuen.github.io/articles/usb?9#lora-parameters

Our #PineDio USB Driver defines these Callback Functions ... For transmitting and receiving #LoRa Messages

https://lupyuen.github.io/articles/usb?10#initialise-lora-sx1262

How we transmit a #LoRa Message with #PineDio USB Dongle

https://lupyuen.github.io/articles/usb?11#transmit-lora-message

Our #PineDio USB Driver won't transmit #LoRa Messages longer than 29 bytes ... But there's a fix for this!

https://lupyuen.github.io/articles/usb?12#transmit-lora-message

#PineDio USB successfully transmits a #LoRa Message (29 bytes) to RAKwireless WisBlock

https://lupyuen.github.io/articles/usb?15#run-the-driver-1

Software Defined Radios are super helpful ... For troubleshooting #LoRa Devices!

https://lupyuen.github.io/articles/usb?16#spectrum-analysis-with-sdr

Here's how we receive a #LoRa Message on #PineDio USB Dongle

https://lupyuen.github.io/articles/usb?17#receive-lora-message

#PineDio USB Dongle receives a #LoRa Message (28 bytes) ... From RAKwireless WisBlock

https://lupyuen.github.io/articles/usb?18#run-the-driver-2

#PineDio USB Dongle uses a CH341 USB Interface Module ... To talk to #LoRa SX1262 (over SPI)

https://lupyuen.github.io/articles/usb?19#ch341-spi-interface

How we init the #CH341 SPI Driver on #PineDio USB Dongle

https://lupyuen.github.io/articles/usb?20#initialise-spi

Transferring SPI Data with #CH341 SPI Driver ... On #PineDio USB Dongle

https://lupyuen.github.io/articles/usb?21#transfer-spi

Long #LoRa Messages are garbled on #PineDio USB Dongle ... Let's solve the mystery

https://lupyuen.github.io/articles/usb?22#long-messages-are-garbled

Tracing the #PineDio USB Driver ... To uncover why it garbles Long #LoRa Messages

https://lupyuen.github.io/articles/usb?23#transmit-long-message

Aha! SPI Transfers of 32 bytes (or more) will fail on the CH341 SPI Driver!

https://lupyuen.github.io/articles/usb?24#spi-transfer-fails-with-32-bytes

Fixing Long #LoRa Messages on #PineDio USB Dongle ... By transferring smaller chunks over SPI

https://lupyuen.github.io/articles/usb?25#fix-long-messages

Do we need Long #LoRa Messages on #PineDio USB Dongle? Maybe not!

https://lupyuen.github.io/articles/usb?26#fix-long-messages

#PineDio USB Dongle also controls #LoRa SX1262 over GPIO

https://lupyuen.github.io/articles/usb?27#ch341-gpio-interface

Receiving #LoRa Messages in a Background Thread ... With NimBLE Porting Layer

https://lupyuen.github.io/articles/usb?28#multithreading-with-nimble-porting-layer

What's Next for #PineDio USB Dongle: LoRaWAN, LoRa Mesh, PinePhone, ...

https://lupyuen.github.io/articles/usb?29#whats-next

Here's how we build a #LoRa SX1262 Driver for #PineDio USB Adapter @PINE64 ... And test it on #Pinebook Pro

https://lupyuen.github.io/articles/usb