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Add support for acting as Modbus server (#4874)

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Co-authored-by: Jeroen van Oort <jeroen.vanoort@webparking.nl>
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
Jeroen van Oort
2024-05-22 06:17:32 +02:00
committed by GitHub
parent 76abf2200c
commit 1ca7c2d7dd
7 changed files with 203 additions and 21 deletions
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esphome/components/modbus/modbus.h
+9
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@@ -8,6 +8,11 @@
namespace esphome {
namespace modbus {
enum ModbusRole {
CLIENT,
SERVER,
};
class ModbusDevice;
class Modbus : public uart::UARTDevice, public Component {
@@ -27,11 +32,14 @@ class Modbus : public uart::UARTDevice, public Component {
void send(uint8_t address, uint8_t function_code, uint16_t start_address, uint16_t number_of_entities,
uint8_t payload_len = 0, const uint8_t *payload = nullptr);
void send_raw(const std::vector<uint8_t> &payload);
void set_role(ModbusRole role) { this->role = role; }
void set_flow_control_pin(GPIOPin *flow_control_pin) { this->flow_control_pin_ = flow_control_pin; }
uint8_t waiting_for_response{0};
void set_send_wait_time(uint16_t time_in_ms) { send_wait_time_ = time_in_ms; }
void set_disable_crc(bool disable_crc) { disable_crc_ = disable_crc; }
ModbusRole role;
protected:
GPIOPin *flow_control_pin_{nullptr};
@@ -50,6 +58,7 @@ class ModbusDevice {
void set_address(uint8_t address) { address_ = address; }
virtual void on_modbus_data(const std::vector<uint8_t> &data) = 0;
virtual void on_modbus_error(uint8_t function_code, uint8_t exception_code) {}
virtual void on_modbus_read_registers(uint8_t function_code, uint16_t start_address, uint16_t number_of_registers){};
void send(uint8_t function, uint16_t start_address, uint16_t number_of_entities, uint8_t payload_len = 0,
const uint8_t *payload = nullptr) {
this->parent_->send(this->address_, function, start_address, number_of_entities, payload_len, payload);