The M5Stamp ISP is an ESP32 programming tool with a USB to the serial port in the STAMP series package, that has a CH9102 chip inside, a built in 3.3V DCDC circuit, a 5V power supply and USB D+/D- signal line led out on the side of the PCB. It adopts the STAMP package and can support SMD, DIP, flying wire, and other uses. Functions * Full speed USB device interface, USB 2.0 compatible, Type C interface. * Hardware full duplex serial UART interface * Supports communication baud rate varies from 50bps to 4Mbps. * 3.3V OUTPUT * ±8kV ESD protection * Program download indicator (red/blue) Package Contents * 1x Stamp ISP * 1x 1.5mm hex key * 1x 2.54-6-pin Curved needles * 1x 2.54-6-pin Inline needles Specifications Resources Parameters USB communication chip CH9102F Step-down DCDC power supply chip SY8089 USB interface type Type C Output voltage 3.3V ESD protect ±8kV Product Size 20mm × 20mm × 4.7mm Package Size 136mm × 92mm × 13mm Product Weight 2.9g Package Weight 6.8g Resources * Product Wiki https://elecena.pl/product/22728170/m5stamp-isp-serial-programmer-module-ch9102 2023-03-07 https://elecena.pl/product/22728170/m5stamp-isp-serial-programmer-module-ch9102 2023-12-27 https://elecena.pl/product/22728170/m5stamp-isp-serial-programmer-module-ch9102 2024-09-18 https://elecena.pl/product/22728170/m5stamp-isp-serial-programmer-module-ch9102 2024-11-29 https://elecena.pl/product/22728170/m5stamp-isp-serial-programmer-module-ch9102 2024-11-30 https://elecena.pl/product/22728170/m5stamp-isp-serial-programmer-module-ch9102 2025-04-29 https://elecena.pl/product/22728170/m5stamp-isp-serial-programmer-module-ch9102 2025-11-28 https://elecena.pl/product/22728170/m5stamp-isp-serial-programmer-module-ch9102 2025-11-29