PUSR USR-M100-ARD User manual

USR-M100-ARD User Guide
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User Guide
USR-M100-ARD
V2.0

USR-M100-ARD User Guide
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Content
1. Introduction ...............................................................................................................................................- 3 -
1.1. Overview...........................................................................................................................................- 3 -
1.2. Parameters table...............................................................................................................................- 3 -
1.3. Dimension ........................................................................................................................................- 4 -
2. Arduino IDE Using ......................................................................................................................................- 4 -
3. Program burning........................................................................................................................................- 6 -
3.1. Programming via Arduino .................................................................................................................- 6 -
3.2. Programming via ESP32 download tool .............................................................................................- 8 -
4. Functional Test.........................................................................................................................................- 11 -
5. Contact Us................................................................................................................................................- 16 -
6. Disclaimer................................................................................................................................................ - 16 -

USR-M100-ARD User Guide
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1. Introduction
1.1. Overview
USR-M100-ARD is an open source IoT gateway powered by Espressif’s ESP32 module equipped with low
power Xtensa® 32-bit LX6 MCU 240 MHz processor with 4MB pSRAM and up to 8MB SPI flash memory on-board. It
integrates rich hardware interface: RS485/232, DO*2, DI*1, AI*1, downloading port, Wi-Fi, Ethernet port and BLE.
PUSR provides basic source code demo for users to develop their own application. For the rich hardware
interface and networking methods, this device can be applied in a variety of scenarios, especially scenarios
where users need to collect or control serial devices and IO devices simultaneously, such as: Wastewater
Treatment, Agricultural Irrigation, Solar Energy, Intelligent Farming etc.
1.2. Parameters table
USR-M100-ARD Parameters
Chipset
ESP32-WROVER-E
Professor
Dual-core Xtensa® 32-bit LX6 MCU, 1.2GHz
RAM
8M
Flash
4M
Power Supply
9~36V
Hardware Interface
RS232/485
1*RS232/485,
Default parameter: 115200, N, 8, 1
DI
1*digital input
DO
2*digital output
AI
1*analog input(4~20mA)
Wi-Fi
Stadard
IEEE802.11b/g/n
Speed
Up to 150Mbps
Frequency
2412 ~ 2484 MHz
Others
BLE
Compatible with BEL4.2
Table 1. Parameters of USR-M100-ARD
USR-M100-ARD provides 2 indicators in total, the specific description is as follows.
Table 2. LED indicator
Name
Description
PWR
Steady on: power supply is normal.
Off: No power supply or abnormal power supply.
WORK
Steady on: The system works normally.

USR-M100-ARD User Guide
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1.3. Dimension
➢DIN-Rail mounting and wall mounting supported.
➢79.6*58*110.0mm (L*W*H, accessories not included)
Figure 1. Dimension of USR-M100-ARD
2. Arduino IDE Using
1> Download and install Arduino IDE: https://www.arduino.cc/en/Main/Software
2> After installing the IDE, add additional boards manager URLs:
https://dl.espressif.com/dl/package_esp32_index.json
File->Preference-> Add Additional Boards Manager URLs

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3> Install ESP32 Boards
Tools->Board Manager->Search “ESP”
4> Add library to installation path
PUSR offers library source code of AWS, Modbus, users can download from Github: 插入代码连接

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The downloaded libraries should be copied to the installation path of Arduino IDE.
Note: Users are strongly encouraged to use the AWS and Modbus libraries we provide.
Users can also download the other libraries needed on Arduino IDE.
Sketch->Library Manager->Search ”Modbus”->Install
3. Program burning
3.1. Programming via Arduino
1> Hardware connection
USR-M100-ARD*1
USB to TTL converter *1
Wi-Fi antenna*1
The hardware connection is like this:

USR-M100-ARD User Guide
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2> Downloading parameters settings
Tools-->Board-->“ESP32-WROOM-DA Module”
Tools-->Board-->Port-->Select the right COM

USR-M100-ARD User Guide
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3> Users could edit, compile, and download code on the Arduino IDE.
Click the “Upload” button to compile the code first, When the compilation is about to be completed, press
and hold the reload button, power on the USR-M100-ARD. Do not release the reload button during the program
download process, otherwise the program will fail to be burned.
3.2. Programming via ESP32 download tool
1> Users can edit code on Arduino IDE, and export compiled binary file.

USR-M100-ARD User Guide
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2> Open flash_download_tool, Chipset—ESP32
3> Load .bin file
xxx.ino.bin Start register address：0x10000
xxx.ino.bootloader.bin Start register address：0x1000
xxx.ino.partitions.bin Start register address：0x8000
Select COM port, BAUD is 921600.
SPIFlashConfig: 40MHz，DIO，DoNotChgBin

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4> Power off the USR-M100-ARD, hold on the reload button, power on the USR-M100-ARD device, click
“START”button, it starts to programming.
5> Finished the programming.