V4.0

• 2025-09-24 public sale

• MCU:

  • From ESP32-S3N8 to ESP32-S3R2
  • Flash has been upgraded from 8MB built-in to 16MB external, with the addition of 2M PSRAM.

• Power:

  • Add SH1.25-2P solar energy interface.

• Wireless performance:

  • LoRa transmission power upgraded from 21 ± 1dBm to 28 ± 1dBm.
  • 2.4G antenna, upgraded from metal spring antenna to FPC antenna.

• Peripheral Interface:

  • Cancel CP2102.
  • Add SH1.25-8Pin GNSS interface.
  • Pin expansion from 36Pin to 40Pin, providing more GPIO.

• Process and Design:

  • The screen connection method has changed from welding to B2B interface, supporting free disassembly and assembly of the screen.
  • The pin process has changed from silver plating to gold plating, resulting in better conductivity and oxidation resistance.
  • There is a plastic screen stand as mechanical protection

German Warehouse Supported Countries/Regions​

Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, United Kingdom.

US Warehouse Supported States/Regions:​

• South: Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Virginia, West Virginia
• Midwest: Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, Pennsylvania, South Dakota, Wisconsin
• West: Arizona, California, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming
• Northeast: Connecticut, District of Columbia, Maine, Massachusetts, New Hampshire, New Jersey, New York, Rhode Island, Vermont
• Not Supported: Alaska, Hawaii, Puerto Rico

2.4GHz Antenna​

The default 2.4G FPC antenna is located on the side of the plastic screen bracket.

If you wish to use an IPEX-connected 2.4G antenna, you need to remove the inductor marked as ① in the diagram below, and add a 0-ohm resistor (or other conductive metal or cable) at the position marked ② to connect to the IPEX interface. 

My screws look a bit odd​

This area is attached with a 2.4G FPC antenna,and to avoid affecting its performance, customized plastic screws are used here. That’s why they look different from ordinary screws. When you need to remove it, gently press and turn with a screwdriver.

What development methods does it support​

• Arduino
• Micro Python
• Platform.io
• Espressif IDE We strongly recommend using Arduino. We have complete technical support and provide complete LoRaWAN code for ESP32 Arduino framework.

What’s the battery socket type​

You can find this type of socket by search “SH1.25 x 2”.

Can I order a version without the OLED display​

Of course, you can contact our sales staff and provide your ideas.

Are V3 and V4 compatible​

They are compatible in most scenarios. Since V4 uses the same series of chips as V3, features the same OLED, and has an almost identical pin layout, V3 and V4 can be used interchangeably in the majority of cases. However, due to the increased transmit power, the transmit power settings in some code may no longer correspond directly to the actual output.

Failed to upload code​

Please try the following steps:

1.Try using a different USB cable.

2.Enter BootLoader mode. There are two methods to enter this mode:

• Hold down the PRG button, connect the USB-C cable, then release the PRG button.
• Connect the USB-C cable, hold down the PRG button, press the RST button once, then release the PRG button.

Why are there no resistors soldered on the 868 and 915 markings & Which frequency band does my device actually support​

It indicates simultaneous support for both 868 MHz and 915 MHz frequency bands.

In the initial design, we developed two separate hardware versions to achieve optimal RF performance. However, through subsequent debugging, we have successfully unified the hardware for both 868 MHz and 915 MHz while maintaining excellent RF characteristics.

Support

Monday-Friday (9:30-6:30) Saturday (9:30-5:30)

Email: services01@spotpear.com