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5624fafb3a
* teleinfo: avoid a buffer overflow.
When reading tag or values, data is written to the buffer even if the
size if bigger than the buffer. Add a new 'max_len' argument to
get_field() to avoid this error.
Signed-off-by: 0hax <0hax@protonmail.com>
* teleinfo: read extra timestamp field for some tags.
Some tags has an extra timestamp field that need to be read before the
actual data.
The code is inspired by Jpsy work:
29339c14f9
Signed-off-by: 0hax <0hax@protonmail.com>
* teleinfo: increase MAX_BUF_SIZE to suffice for 3-phase Linky in Standard mode.
* teleinfo: handle DATE tag correctly.
The DATE tag is special due its format and need to be handled
separately.
Fix from DrCoolzic.
Signed-off-by: 0hax <0hax@protonmail.com>
Co-authored-by: Jörg Wagner <jwagner@digilog.de>
53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
#pragma once
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#include "esphome/core/component.h"
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#include "esphome/components/uart/uart.h"
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namespace esphome {
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namespace teleinfo {
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/*
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* 198 bytes should be enough to contain a full session in historical mode with
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* three phases. But go with 1024 just to be sure.
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*/
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static const uint8_t MAX_TAG_SIZE = 64;
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static const uint16_t MAX_VAL_SIZE = 256;
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static const uint16_t MAX_BUF_SIZE = 2048;
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static const uint16_t MAX_TIMESTAMP_SIZE = 14;
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class TeleInfoListener {
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public:
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std::string tag;
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virtual void publish_val(const std::string &val){};
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};
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class TeleInfo : public PollingComponent, public uart::UARTDevice {
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public:
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TeleInfo(bool historical_mode);
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void register_teleinfo_listener(TeleInfoListener *listener);
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void loop() override;
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void setup() override;
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void update() override;
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void dump_config() override;
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std::vector<TeleInfoListener *> teleinfo_listeners_{};
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protected:
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uint32_t baud_rate_;
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int checksum_area_end_;
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int separator_;
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char buf_[MAX_BUF_SIZE];
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uint32_t buf_index_{0};
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char tag_[MAX_TAG_SIZE];
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char val_[MAX_VAL_SIZE];
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char timestamp_[MAX_TIMESTAMP_SIZE];
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enum State {
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OFF,
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ON,
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START_FRAME_RECEIVED,
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END_FRAME_RECEIVED,
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} state_{OFF};
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bool read_chars_until_(bool drop, uint8_t c);
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bool check_crc_(const char *grp, const char *grp_end);
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void publish_value_(const std::string &tag, const std::string &val);
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};
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} // namespace teleinfo
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} // namespace esphome
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