Function pamoja_modbus_client_read_coils 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn pamoja_modbus_client_read_coils(
    client: *const PamojaModbusClient,
    unit: u8,
    start: u16,
    quantity: u16,
    out_values: *mut u8,
    out_error: *mut PamojaModbusClientError,
) -> PamojaStatus

Reads coils, function 0x01.

Arguments

• client - the client.
• unit - the device, 1 to 247.
• start - the first coil’s address.
• quantity - how many, 1 to 2000.
• out_values - receives one byte per coil, 1 for on, in address order.
• out_error - receives why the call failed, or null.

Returns

PamojaStatus::Ok; PamojaStatus::InvalidArgument for a request that cannot be sent; PamojaStatus::Io for a port failure or a timeout; PamojaStatus::Codec for a reply that fails its checks; or PamojaStatus::Other for the device’s exception. The reason is in the last error message and, in detail, in out_error.

Safety

client must be a live handle or null, out_values must point to quantity writable bytes, and out_error must be a writable pointer or null.