Sa9123l Driver May 2026

A: Yes, in 95% of cases. The SA9123L is internally compatible with the CH340. Use the CH341SER driver from WCH.

Add your user to the dialout group:

sudo usermod -a -G dialout $USER

Log out and log back in, or reboot.

Since manufacturers often provide specific datasheets with register maps under NDA or specific part numbers, below is a generic driver implementation structure based on standard SA9123 series behavior. sa9123l driver

#include <stdint.h>
#include "spi.h" // Include your MCU's SPI library
// SA9123L Opcodes and Addresses (Hypothetical example - refer to datasheet)
#define SA9123L_CMD_READ    0x01
#define SA9123L_REG_ENERGY  0x00
#define SA9123L_REG_VOLTAGE 0x01
#define SA9123L_REG_CURRENT 0x02
// Function to read 24-bit data from a register
uint32_t SA9123L_ReadRegister(uint8_t regAddress)  rxBuffer[3];
return value;
// Function to calculate actual Voltage
float SA9123L_GetVoltage(void) 
    uint32_t rawVoltage = SA9123L_ReadRegister(SA9123L_REG_VOLTAGE);
// Apply conversion formula from datasheet
    // Example: V_rms = Raw_Value * V_ref / (ADC_Resolution * Voltage_Divider_Ratio)
    // This constant depends on your hardware design.
    float voltage = rawVoltage * 0.00125; // Example constant
return voltage;
// Function to calculate Energy
float SA9123L_GetEnergy(void) 
    uint32_t rawEnergy = SA9123L_ReadRegister(SA9123L_REG_ENERGY);
    // Convert to kWh based on meter constant (imp/kWh)
    return (float)rawEnergy / 3200.0;

A:

For gamers or live monitoring, the internal buffer can be reduced via external EEPROM config. Real-world round-trip latency hovers around 4–6 ms (comparable to entry-level RME interfaces).

For engineers and hobbyists working with this chip, here are the key parameters: A : Yes, in 95% of cases

| Parameter | Value | |-----------|-------| | Interface | USB 2.0 Full Speed (12 Mbps) | | Serial Protocols | RS232, TTL (3.3V / 5V tolerant) | | Supported Baud Rates | 300 bps – 921600 bps | | Data Bits | 5, 6, 7, 8 | | Stop Bits | 1, 2 | | Parity | None, Even, Odd, Mark, Space | | Flow Control | Hardware (RTS/CTS), Software (XON/XOFF) | | FIFO Buffer | 64 bytes RX, 64 bytes TX (typical) | | Operating Voltage | 3.3V – 5V (TTL side) | | Max Current | 15 mA (active) | | Temperature Range | -40°C to +85°C (industrial grade) | | Package | SOP-16, SSOP-20 |

Apple frequently breaks unsigned kernel extensions. The SA9123L driver must be manually allowed.

Step 1: Download the Driver

Step 2: Install

Step 3: Allow the System Extension

Step 4: Verify/Assign the COM port