Table of Contents:

1. Introduction

This article shows the firmware upgrade method and troubleshooting for the below models Dragino sensors.

2. Model and Connection

2.1 LDS01/LWL01

Firmware Location

Pin Mapping:

image-20220527083845-1.png

LDS01/LWL01 Pin Mapping

DAP-Link Connection:

image-20220527083959-2.png

Connect DAP-Link

2.2 LDS02/LWL02

Firmware Location(same as LDS01)

Pin Mapping:

image-20220527084041-3.png

LDS02/LDS02 v2.0 Pin Mapping

Connector Type: 2.0mm pitch, 2 x 3

image-20220527084230-4.png

LDS02/LDS02 v2.2 Pin Mapping

2.3 LHT52

Firmware Location

image-20220527084401-5.png

LHT52 Pin Mapping

3. How to Upgrade

3.1 Use DAP-Link and Connect to the Device as above photos

We need to connect VDD,GND,SWCLK,SWDIO to DAP-Link.

image-20220527084505-6.png

3.2 Install PSoCProgrammer 3.27.1

Download Link: PSoCProgrammer3.27.1

And then use PSoCProgrammer to upgrade the firmware ( must use this version: PSoCProgrammer3.27.1 )

image-20220527084537-7.png

3.3 Download Sensor Firmware

Downlink sensor firmware to prepare the update.

3.4 Upgrade Firmware

Open PSOC Programmer, select the default configuration, no need to modify

image-20220527084612-8.png

Click the file icon to select the software to be burned:

image-20220527084705-9.png

image-20220527084739-10.png

Click the download icon, and the progress bar as shown in the figure below will appear. When PASS appears, it proves that the burning is successful.

image-20220527084831-11.png

image-20220527084907-12.png

It is very important to press the reset button after the upgrade., this is to set the device to work in Low Power mode.

If you change different LoRa Frequency Bands/Region, you need using AT+FDR command to restore factory data after program success.

4. Trouble Shooting

4.1 Unable to detect upgrade