modbus_helpers.cpp File Reference

Go to the source code of this file.

Namespaces
namespace	esphome
namespace	esphome::modbus
namespace	esphome::modbus::helpers

Functions
uint16_t	esphome::modbus::helpers::server_pdu_length (const uint8_t *frame, size_t size)
uint16_t	esphome::modbus::helpers::client_pdu_length (const uint8_t *frame, size_t size)
bool	esphome::modbus::helpers::is_server_pdu_standard (const uint8_t *pdu, size_t size)
bool	esphome::modbus::helpers::is_client_pdu_standard (const uint8_t *pdu, size_t size)
void	esphome::modbus::helpers::log_unsupported_value_type (SensorValueType value_type)
std::optional< int64_t >	esphome::modbus::helpers::payload_to_number (const uint8_t *data, size_t size, SensorValueType sensor_value_type, uint8_t offset, uint32_t bitmask)
	Convert a raw response payload to a number.
std::optional< int64_t >	esphome::modbus::helpers::registers_to_number (const uint16_t *registers, size_t count, SensorValueType sensor_value_type)
	Reconstruct a number from register words (host byte order).
ReadPdu	esphome::modbus::helpers::create_read_pdu (FunctionCode function_code, uint16_t start_address, uint16_t number_of_entities)
	Create a modbus read request PDU.
PduBuffer	esphome::modbus::helpers::create_client_pdu (FunctionCode function_code, uint16_t start_address, uint16_t number_of_entities, const uint8_t *values=nullptr, size_t values_len=0)
	Create a modbus client pdu for reading/writing single/multiple coils/register/inputs.
PduBuffer	esphome::modbus::helpers::create_write_registers_pdu (uint16_t start_address, std::span< const uint16_t > values)
	Create modbus write multiple registers command Function 0x10 Write Multiple Registers.
WriteFewRegistersPdu	esphome::modbus::helpers::create_write_few_registers_pdu (uint16_t start_address, std::span< const uint16_t > values)
	Create modbus write multiple registers command (function 0x10) on a right-sized stack buffer.
PduBuffer	esphome::modbus::helpers::create_read_write_multiple_registers_pdu (uint16_t read_start_address, uint16_t read_count, uint16_t write_start_address, std::span< const uint16_t > write_values)
	Create modbus read/write multiple registers command Function 0x17 Read/Write Multiple Registers Writes write_values then reads read_count registers in one transaction (write first, per Modbus 6.17); the response carries only the read registers.
WriteSinglePdu	esphome::modbus::helpers::create_write_single_register_pdu (uint16_t start_address, uint16_t value)
	Create modbus write single register command Function 0x06 Write Single Register.
WriteSinglePdu	esphome::modbus::helpers::create_write_single_coil_pdu (uint16_t address, bool value)
	Create modbus write single coil command Function 0x05 Write Single Coil.
PduBuffer	esphome::modbus::helpers::create_write_coils_pdu (uint16_t start_address, PackedBits bits)
	Create modbus write multiple coils command (function 0x0F) from bits packed as on the wire.
PduBuffer	esphome::modbus::helpers::create_write_coils_pdu (uint16_t start_address, std::span< const bool > values)
	Create modbus write multiple coils command Function 0x0F Write Multiple Coils.
PduBuffer	esphome::modbus::helpers::create_write_coils_pdu (uint16_t start_address, const std::vector< bool > &values)
	Create modbus write multiple coils command (function 0x0F) from a std::vector<bool>.