Skystars RC’s Kramam KM55 AM32 4-In-1 ESC may be the first commercially available multirotor ESC released with the AM32 firmware.

The AM32 firmware is designed for STM32 ARM processors to control a brushless motor (BLDC). The firmware is intended to be safe and fast with smooth fast startups and linear throttle. It is meant for use with multirotor aircraft and a flight controller.

AM32 is similar to BLHeli_32, except it is open-source. Join the development at the AM32 Github.

AM32 Github

Specifications:

• Input voltage: 3-6S LiPo
• Con.Current: 55A
• Peak Current: 70A@ 10S
• Firmware: AM_32
• Support: Dshot 600/1200
• Mounting hole : 20X20 mm/M3
• BEC: No
• Product size: 35*47*6.5mm
• Weight: 16.5g

Includes:
1x Skystars AM32 KM55A 32Bit 3-6S 20×20 4in1 ESC