67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
/*
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TasmotaModbus.h - Basic modbus wrapper for TasmotaSerial for Tasmota
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Copyright (C) 2021 Theo Arends
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This library is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TasmotaModbus_h
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#define TasmotaModbus_h
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#include <Arduino.h>
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#include <TasmotaSerial.h>
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#define TM_MODBUS_BAUDRATE 9600 // Default baudrate
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class TasmotaModbus : public TasmotaSerial {
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public:
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TasmotaModbus(int receive_pin, int transmit_pin);
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virtual ~TasmotaModbus() {}
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int Begin(long speed = TM_MODBUS_BAUDRATE, uint32_t config = SERIAL_8N1);
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uint16_t CalculateCRC(uint8_t *frame, uint8_t num);
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void Send(uint8_t device_address, uint8_t function_code, uint16_t start_address, uint16_t register_count);
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bool ReceiveReady();
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/* Return codes:
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* 0 = No error
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* 1 = Illegal Function,
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* 2 = Illegal Data Address,
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* 3 = Illegal Data Value,
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* 4 = Slave Error
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* 5 = Acknowledge but not finished (no error)
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* 6 = Slave Busy
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* 7 = Not enough minimal data received
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* 8 = Memory Parity error
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* 9 = Crc error
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* 10 = Gateway Path Unavailable
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* 11 = Gateway Target device failed to respond
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*/
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uint8_t ReceiveBuffer(uint8_t *buffer, uint8_t register_count);
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uint8_t Receive16BitRegister(uint16_t *value);
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uint8_t Receive32BitRegister(float *value);
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uint8_t ReceiveCount(void) { return mb_len; }
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private:
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uint8_t mb_address;
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uint8_t mb_len;
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};
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#endif // TasmotaModbus_h
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