RK3588 RS232 serial port board

Androidsbc - China source manufacturer for RK3588 smart community terminal board. Featured model ASB-RK3588-EXP (Expansion I/O Board): Rockchip RK3588, 8nm, 4x Cortex-A76 @2.4GHz + 4x Cortex-A55 @1.8GHz; 128GB eMMC 5.1, microSD + M.2 NVMe; HDMI 2.1 8K + 2x HDMI 2.0 (triple display); RS232/RS485, CAN, 7x GPIO, I2C, SPI, PWM, ADC, I2S audio; Dual Gigabit Ether···