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Add board support for JL401-S3 datalogger#10820

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tannewt merged 1 commit intoadafruit:10.0.xfrom
NHBSystems:jl401-s3
Feb 17, 2026
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Add board support for JL401-S3 datalogger#10820
tannewt merged 1 commit intoadafruit:10.0.xfrom
NHBSystems:jl401-s3

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@jjuliano77 jjuliano77 commented Feb 15, 2026

Summary

  • Adds board definition files for the NHB Systems L401-S3 datalogger board. (Not yet released)
  • Uses ESP32-S3-Mini-1 module (4MB Flash, 2MB PSRAM) with native USB-C
  • On-board peripherals include an AD7124-4 24 bit ADC, PCA9546A I2C mux, MCP7940N RTC, LSM6DSO IMU, and uSD slot

Testing

  • Firmware builds and runs successfully on board
  • All peripherals tested individually
  • Long running script that utilizes all peripherals, records to file, and publishes data via MQTT

tannewt
tannewt approved these changes Feb 17, 2026
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Thanks!

@tannewt tannewt merged commit e238390 into adafruit:10.0.x Feb 17, 2026
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@jjuliano77 jjuliano77 deleted the jl401-s3 branch March 8, 2026 01:59
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@jjuliano77 @tannewt