Files
MySensors/core/MyTransport.h
2026-01-01 11:36:35 +01:00

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22 KiB
C

/*
* The MySensors Arduino library handles the wireless radio link and protocol
* between your home built sensors/actuators and HA controller of choice.
* The sensors forms a self healing radio network with optional repeaters. Each
* repeater and gateway builds a routing tables in EEPROM which keeps track of the
* network topology allowing messages to be routed to nodes.
*
* Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
* Copyright (C) 2013-2026 Sensnology AB
* Full contributor list: https://github.com/mysensors/MySensors/graphs/contributors
*
* Documentation: http://www.mysensors.org
* Support Forum: http://forum.mysensors.org
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*/
/**
* @file MyTransport.h
*
* @defgroup MyTransportgrp MyTransport
* @ingroup internals
* @{
*
* Transport-related log messages, format: [!]SYSTEM:[SUB SYSTEM:]MESSAGE
* - [!] Exclamation mark is prepended in case of error
* - SYSTEM:
* - <b>TSM</b>: messages emitted by the transport state machine
* - <b>TSF</b>: messages emitted by transport support functions
* - SUB SYSTEMS:
* - Transport state machine (<b>TSM</b>)
* - TSM:<b>INIT</b> from <b>stInit</b> Initialize transport and radio
* - TSM:<b>FPAR</b> from <b>stParent</b> Find parent
* - TSM:<b>ID</b> from <b>stID</b> Check/request node ID, if dynamic node ID set
* - TSM:<b>UPL</b> from <b>stUplink</b> Verify uplink connection by pinging GW
* - TSM:<b>READY</b> from <b>stReady</b> Transport is ready and fully operational
* - TSM:<b>FAIL</b> from <b>stFailure</b> Failure in transport link or transport HW
* - Transport support function (<b>TSF</b>)
* - TSF:<b>CKU</b> from @ref transportCheckUplink(), checks connection to GW
* - TSF:<b>SID</b> from @ref transportAssignNodeID(), assigns node ID
* - TSF:<b>PNG</b> from @ref transportPingNode(), pings a node
* - TSF:<b>WUR</b> from @ref transportWaitUntilReady(), waits until transport is ready
* - TSF:<b>CRT</b> from @ref transportClearRoutingTable(), clears routing table stored in EEPROM
* - TSF:<b>LRT</b> from @ref transportLoadRoutingTable(), loads RAM routing table from EEPROM (only GW/repeaters)
* - TSF:<b>SRT</b> from @ref transportSaveRoutingTable(), saves RAM routing table to EEPROM (only GW/repeaters)
* - TSF:<b>MSG</b> from @ref transportProcessMessage(), processes incoming message
* - TSF:<b>SAN</b> from @ref transportInvokeSanityCheck(), calls transport-specific sanity check
* - TSF:<b>RTE</b> from @ref transportRouteMessage(), sends message
* - TSF:<b>SND</b> from @ref transportSendRoute(), sends message if transport is ready (exposed)
* - TSF:<b>TDI</b> from @ref transportDisable()
* - TSF:<b>TRI</b> from @ref transportReInitialise()
* - TSF:<b>SIR</b> from @ref transportSignalReport()
*
* Transport debug log messages:
*
* |E| SYS | SUB | Message | Comment
* |-|-----|-------|---------------------------|---------------------------------------------------------------------
* | | TSM | INIT | | <b>Transition to stInit state</b>
* | | TSM | INIT | STATID=%%d | Node ID is static
* | | TSM | INIT | TSP OK | Transport device configured and fully operational
* | | TSM | INIT | TSP PSM | Transport passive mode set
* | | TSM | INIT | GW MODE | Node is set up as GW, thus omitting ID and findParent states
* |!| TSM | INIT | TSP FAIL | Transport device initialization failed
* | | TSM | FPAR | | <b>Transition to stParent state</b>
* | | TSM | FPAR | STATP=%%d | Static parent set, skip finding parent
* | | TSM | FPAR | OK | Parent node identified
* |!| TSM | FPAR | NO REPLY | No potential parents replied to find parent request
* |!| TSM | FPAR | FAIL | Finding parent failed
* | | TSM | ID | | <b>Transition to stID state</b>
* | | TSM | ID | OK,ID=%%d | Node ID is valid
* | | TSM | ID | REQ | Request node ID from controller
* |!| TSM | ID | FAIL,ID=%%d | ID verification failed, ID invalid, no ID received from controller
* | | TSM | UPL | | <b>Transition to stUplink state</b>
* | | TSM | UPL | OK | Uplink OK, GW returned ping
* | | TSF | UPL | DGWC,O=%%d,N=%%d | Uplink check revealed changed network topology, old distance (O), new distance (N)
* |!| TSM | UPL | FAIL | Uplink check failed, i.e. GW could not be pinged
* | | TSM | READY | SRT | Save routing table
* | | TSM | READY | ID=%%d,PAR=%%d,DIS=%%d | <b>Transition to stReady</b> Transport ready, node ID (ID), parent node ID (PAR), distance to GW (DIS)
* |!| TSM | READY | UPL FAIL,SNP | Too many failed uplink transmissions, search new parent
* |!| TSM | READY | FAIL,STATP | Too many failed uplink transmissions, static parent enforced
* | | TSM | FAIL | CNT=%%d | <b>Transition to stFailure state</b>, consecutive failure counter (CNT)
* | | TSM | FAIL | DIS | Disable transport
* | | TSM | FAIL | RE-INIT | Attempt to re-initialize transport
* | | TSF | CKU | OK | Uplink OK
* | | TSF | CKU | OK,FCTRL | Uplink OK, flood control prevents pinging GW in too short intervals
* | | TSF | CKU | DGWC,O=%%d,N=%%d | Uplink check revealed changed network topology, old distance (O), new distance (N)
* | | TSF | CKU | FAIL | No reply received when checking uplink
* | | TSF | SID | OK,ID=%%d | Node ID assigned
* |!| TSF | SID | FAIL,ID=%%d | Assigned ID is invalid
* | | TSF | PNG | SEND,TO=%%d | Send ping to destination (TO)
* | | TSF | WUR | MS=%%lu | Wait until transport ready, timeout (MS)
* | | TSF | MSG | ECHO REQ | ECHO message requested
* | | TSF | MSG | ECHO | ECHO message, do not proceed but forward to callback
* | | TSF | MSG | FPAR RES,ID=%%d,D=%%d | Response to find parent received from node (ID) with distance (D) to GW
* | | TSF | MSG | FPAR PREF FOUND | Preferred parent found, i.e. parent defined via MY_PARENT_NODE_ID
* | | TSF | MSG | FPAR OK,ID=%%d,D=%%d | Find parent response from node (ID) is valid, distance (D) to GW
* | | TSF | MSG | FPAR INACTIVE | Find parent response received, but no find parent request active, skip response
* | | TSF | MSG | FPAR REQ,ID=%%d | Find parent request from node (ID)
* | | TSF | MSG | PINGED,ID=%%d,HP=%%d | Node pinged by node (ID) with (HP) hops
* | | TSF | MSG | PONG RECV,HP=%%d | Pinged node replied with (HP) hops
* | | TSF | MSG | BC | Broadcast message received
* | | TSF | MSG | GWL OK | Link to GW ok
* | | TSF | MSG | FWD BC MSG | Controlled broadcast message forwarding
* | | TSF | MSG | RCV CB | Hand over message to @ref receive() callback function
* | | TSF | MSG | REL MSG | Relay message
* | | TSF | MSG | REL PxNG,HP=%%d | Relay PING/PONG message, increment hop counter (HP)
* |!| TSF | MSG | SIGN VERIFY FAIL | Signing verification failed
* |!| TSF | MSG | REL MSG,NORP | Node received a message for relaying, but node is not a repeater, message skipped
* |!| TSF | MSG | SIGN FAIL | Signing message failed
* |!| TSF | MSG | GWL FAIL | GW uplink failed
* |!| TSF | MSG | ID TK INVALID | Token for ID request invalid
* | | TSF | SAN | OK | Sanity check passed
* |!| TSF | SAN | FAIL | Sanity check failed, attempt to re-initialize radio
* | | TSF | CRT | OK | Clearing routing table successful
* | | TSF | LRT | OK | Loading routing table successful
* | | TSF | SRT | OK | Saving routing table successful
* |!| TSF | RTE | FPAR ACTIVE | Finding parent active, message not sent
* |!| TSF | RTE | DST %%d UNKNOWN | Routing for destination (DST) unknown, send message to parent
* | | TSF | RTE | N2N OK | Node-to-node communication succeeded
* |!| TSF | RTE | N2N FAIL | Node-to-node communication failed, handing over to parent for re-routing
* | | TSF | RRT | ROUTE N=%%d,R=%%d | Routing table, messages to node (N) are routed via node (R)
* |!| TSF | SND | TNR | Transport not ready, message cannot be sent
* | | TSF | TDI | TSL | Set transport to sleep
* | | TSF | TDI | TPD | Power down transport
* | | TSF | TRI | TRI | Reinitialise transport
* | | TSF | TRI | TSB | Set transport to standby
* | | TSF | SIR | CMD=%d,VAL=%d | Get signal report
*
*
* Incoming / outgoing messages:
*
* See <a href="https://www.mysensors.org/download/serial_api_20">here</a> for more detail on the format and definitions.
*
* Receiving a message
* - TSF:MSG:READ,sender-last-destination,s=%%d,c=%%d,t=%%d,pt=%%d,l=%%d,sg=%%d:%%s
*
* Sending a message
* - [!/?]TSF:MSG:SEND,sender-last-next-destination,s=%%d,c=%%d,t=%%d,pt=%%d,l=%%d,sg=%%d,ft=%%d,st=%%s:%%s
*
* Prepended char:
* - <b>none</b>=sending OK
* - <b>!</b>=error sending
* - <b>?</b>=sending status unknown
* Message fields:
* - <b>s</b>=sensor ID
* - <b>c</b>=command
* - <b>t</b>=msg type
* - <b>pt</b>=payload type
* - <b>l</b>=length
* - <b>sg</b>=signing flag
* - <b>ft</b>=failed uplink transmission counter
* - <b>st</b>=send status, OK=success, NACK=no radio ACK received
*
* @startuml
* state top as "Transport" {
* state Init
* state Failure
* state Ready
* state Parent
* state ID
* state Uplink
* }
*
* [*] --> Init
* Init : entry / Read config from eeprom
* Init --> Failure : [! transportInit()\n|| ID == 0\n|| ID == 255 ]
* Init --> Ready : [MY_GATEWAY_FEATURE]
* Init --> Parent : [else]
*
* Parent : entry / Broadcast Find Parent
* Parent --> ID : [MY_PARENT_NODE_IS_STATIC\n|| MY_PASSIVE_NODE\n|| Parent found]
* Parent --> Parent : [timeout\n&& retries left]
* Parent --> Failure : [timeout\n&& no retries left]
*
* ID : entry / Request Node ID
* ID --> Uplink : [ID valid]
* ID --> ID : [timeout\n&& retries left]
* ID --> Failure : [timeout\n&& no retries left]
*
* Uplink : entry / Check uplink (PING)
* Uplink --> Uplink : [timeout\n&& retries left]
* Uplink --> Parent : [timeout\n&& no retries left]
* Uplink --> Ready : [MY_TRANSPORT_UPLINK_CHECK_DISABLED\n|| Uplink ok (PONG)]
*
* Ready : entry / Transport ready callback
* Ready : MY_GATEWAY_FEATURE && Network discovery required / Send discovery
* Ready --> Parent : [!MY_PARENT_NODE_IS_STATIC\n&& Uplink failure overflow]
*
* Failure : entry / Disable transport
* Failure --> Init : [timeout]
* top --> Failure : [MY_TRANSPORT_SANITY_CHECK\n&& !transportSanityCheck]
* @enduml
*
* @brief API declaration for MyTransport
*
*/
#ifndef MyTransport_h
#define MyTransport_h
#include "hal/transport/MyTransportHAL.h"
#ifndef MY_TRANSPORT_MAX_TX_FAILURES
#if defined(MY_REPEATER_FEATURE)
#define MY_TRANSPORT_MAX_TX_FAILURES (10u) //!< search for a new parent node after this many transmission failures, higher threshold for repeating nodes
#else
#define MY_TRANSPORT_MAX_TX_FAILURES (5u) //!< search for a new parent node after this many transmission failures, lower threshold for non-repeating nodes
#endif
#endif
#ifndef MY_TRANSPORT_MAX_TSM_FAILURES
#define MY_TRANSPORT_MAX_TSM_FAILURES (7u) //!< Max. number of consecutive TSM failure state entries (3bits)
#endif
#ifndef MY_TRANSPORT_TIMEOUT_FAILURE_STATE_MS
#define MY_TRANSPORT_TIMEOUT_FAILURE_STATE_MS (10*1000ul) //!< Duration failure state (in ms)
#endif
#ifndef MY_TRANSPORT_TIMEOUT_EXT_FAILURE_STATE_MS
#define MY_TRANSPORT_TIMEOUT_EXT_FAILURE_STATE_MS (60*1000ul) //!< Duration extended failure state (in ms)
#endif
#ifndef MY_TRANSPORT_STATE_TIMEOUT_MS
#define MY_TRANSPORT_STATE_TIMEOUT_MS (2*1000ul) //!< general state timeout (in ms)
#endif
#ifndef MY_TRANSPORT_CHKUPL_INTERVAL_MS
#define MY_TRANSPORT_CHKUPL_INTERVAL_MS (10*1000ul) //!< Interval to re-check uplink (in ms)
#endif
#ifndef MY_TRANSPORT_STATE_RETRIES
#define MY_TRANSPORT_STATE_RETRIES (3u) //!< retries before switching to FAILURE
#endif
#define AUTO (255u) //!< ID 255 is reserved
#define BROADCAST_ADDRESS (255u) //!< broadcasts are addressed to ID 255
#define DISTANCE_INVALID (255u) //!< invalid distance when searching for parent
#define MAX_HOPS (254u) //!< maximal number of hops for ping/pong
#define INVALID_HOPS (255u) //!< invalid hops
#define MAX_SUBSEQ_MSGS (5u) //!< Maximum number of subsequently processed messages in FIFO (to prevent transport deadlock if HW issue)
#define UPLINK_QUALITY_WEIGHT (0.05f) //!< UPLINK_QUALITY_WEIGHT
// parent node check
#if defined(MY_PARENT_NODE_IS_STATIC) && !defined(MY_PARENT_NODE_ID)
#error MY_PARENT_NODE_IS_STATIC but no MY_PARENT_NODE_ID defined!
#endif
#define _autoFindParent (bool)(MY_PARENT_NODE_ID == AUTO) //!< returns true if static parent id is undefined
#define isValidDistance(_distance) (bool)(_distance!=DISTANCE_INVALID) //!< returns true if distance is valid
#define isValidParent(_parent) (bool)(_parent != AUTO) //!< returns true if parent is valid
/**
* @brief Callback type
*/
typedef void(*transportCallback_t)(void);
/**
* @brief Node configuration
*
* This structure stores node-related configurations
*/
typedef struct {
uint8_t nodeId; //!< Current node id
uint8_t parentNodeId; //!< Where this node sends its messages
uint8_t distanceGW; //!< This nodes distance to sensor net gateway (number of hops)
uint8_t passiveMode : 1; //!< Passive mode
uint8_t reserved : 7; //!< Reserved
} transportConfig_t;
/**
* @brief SM state
*
* This structure stores SM state definitions
*/
typedef struct {
void(*Transition)(void); //!< state transition function
void(*Update)(void); //!< state update function
} transportState_t;
/**
* @brief Datatype for internal RSSI storage
*/
typedef int16_t transportRSSI_t; //!< Datatype for internal RSSI storage
// helper macro for conversion
#define transportInternalToRSSI(__value) ((int16_t)__value >> 4) //!< Convert internal RSSI to RSSI
#define transportRSSItoInternal(__value) ((transportRSSI_t)__value << 4) //!< Convert RSSI to internal RSSI
/**
* @brief Status variables and SM state
*
* This structure stores transport status and SM variables
*/
typedef struct {
// SM variables
transportState_t *currentState; //!< pointer to current FSM state
uint32_t stateEnter; //!< state enter timepoint
// general transport variables
uint32_t lastUplinkCheck; //!< last uplink check, required to prevent GW flooding
// 8 bits
bool findingParentNode : 1; //!< flag finding parent node is active
bool preferredParentFound : 1; //!< flag preferred parent found
bool uplinkOk : 1; //!< flag uplink ok
bool pingActive : 1; //!< flag ping active
bool transportActive : 1; //!< flag transport active
uint8_t stateRetries : 3; //!< retries / state re-enter (max 7)
// 8 bits
uint8_t failedUplinkTransmissions : 4; //!< counter failed uplink transmissions (max 15)
uint8_t failureCounter : 3; //!< counter for TSM failures (max 7)
bool msgReceived : 1; //!< flag message received
uint8_t pingResponse; //!< stores I_PONG hops
#if defined(MY_SIGNAL_REPORT_ENABLED)
transportRSSI_t uplinkQualityRSSI; //!< Uplink quality, internal RSSI representation
#endif
} transportSM_t;
/**
* @brief RAM routing table
*/
typedef struct {
uint8_t route[SIZE_ROUTES]; //!< route for node
} routingTable_t;
// PRIVATE functions
/**
* @brief Initialize SM variables and transport HW
*/
void stInitTransition(void);
/**
* @brief Initialize transport
*/
void stInitUpdate(void);
/**
* @brief Find parent
*/
void stParentTransition(void);
/**
* @brief Verify find parent responses
*/
void stParentUpdate(void);
/**
* @brief Send ID request
*/
void stIDTransition(void);
/**
* @brief Verify ID response and GW link
*/
void stIDUpdate(void);
/**
* @brief Send uplink ping request
*/
void stUplinkTransition(void);
/**
* @brief Verify uplink response
*/
void stUplinkUpdate(void);
/**
* @brief Set transport OK
*/
void stReadyTransition(void);
/**
* @brief Monitor transport link
*/
void stReadyUpdate(void);
/**
* @brief Transport failure and power down radio
*/
void stFailureTransition(void);
/**
* @brief Re-initialize transport after timeout
*/
void stFailureUpdate(void);
/**
* @brief Switch SM state
* @param newState New state to switch SM to
*/
void transportSwitchSM(transportState_t &newState);
/**
* @brief Update SM state
*/
void transportUpdateSM(void);
/**
* @brief Request time in current SM state
* @return ms in current state
*/
uint32_t transportTimeInState(void);
/**
* @brief Call transport driver sanity check
*/
void transportInvokeSanityCheck(void);
/**
* @brief Process all pending messages in RX FIFO
*/
void transportProcessFIFO(void);
/**
* @brief Receive message from RX FIFO and process
*/
void transportProcessMessage(void);
/**
* @brief Assign node ID
* @param newNodeId New node ID
* @return true if node ID is valid and successfully assigned
*/
bool transportAssignNodeID(const uint8_t newNodeId);
/**
* @brief Wait and process messages for a defined amount of time until specified message received
* @param waitingMS Time to wait and process incoming messages in ms
* @param cmd Specific command
* @param msgType Specific message type
* @return true if specified command received within waiting time
*/
bool transportWait(const uint32_t waitingMS, const uint8_t cmd, const uint8_t msgType);
/**
* @brief Ping node
* @param targetId Node to be pinged
* @return hops from pinged node or 255 if no answer received within 2000ms
*/
uint8_t transportPingNode(const uint8_t targetId);
/**
* @brief Send and route message according to destination
*
* This function is used in MyTransport and omits the transport state check, i.e. message can be sent even if transport is not ready
*
* @param message
* @return true if message sent successfully
*/
bool transportRouteMessage(MyMessage &message);
/**
* @brief Send and route message according to destination with transport state check
* @param message
* @return true if message sent successfully and false if sending error or transport !OK
*/
bool transportSendRoute(MyMessage &message);
/**
* @brief Send message to recipient
* @param to Recipient of message
* @param message
* @return true if message sent successfully
*/
bool transportSendWrite(const uint8_t to, MyMessage &message);
/**
* @brief Check uplink to GW, includes flooding control
* @param force to override flood control timer
* @return true if uplink ok
*/
bool transportCheckUplink(const bool force = false);
// PUBLIC functions
/**
* @brief Wait until transport is ready
* @param waitingMS timeout in MS, set 0 (default) for no timeout, i.e. wait indefinitely. For a node in standalone mode (optional network connection) set >0 to allow a node entering the main loop() function.
* @return true if transport is ready
*/
bool transportWaitUntilReady(const uint32_t waitingMS = 0);
/**
* @brief Initialize transport and SM
*/
void transportInitialise(void);
/**
* @brief Process FIFO msg and update SM
*/
void transportProcess(void);
/**
* @brief Flag transport ready
* @return true if transport is initialized and ready
*/
bool isTransportReady(void);
/**
* @brief Flag searching parent ongoing
* @return true if transport is searching for parent
*/
bool isTransportSearchingParent(void);
/**
* @brief Flag TSM extended failure
* @return true if TSM had too many consecutive failure state entries
*/
bool isTransportExtendedFailure(void);
/**
* @brief Flag valid message received
* @return true if valid message received, needs to be reset if used
*/
bool isMessageReceived(void);
/**
* @brief Reset message received flag
*/
void resetMessageReceived(void);
/**
* @brief Clear routing table
*/
void transportClearRoutingTable(void);
/**
* @brief Return heart beat
* @return MS in current state
*/
uint32_t transportGetHeartbeat(void);
/**
* @brief Load routing table from EEPROM to RAM.
* Only for GW devices with enough RAM, i.e. ESP8266, RPI Sensebender GW, etc.
* Atmega328 has only limited amount of RAM
*/
void transportLoadRoutingTable(void);
/**
* @brief Save routing table to EEPROM.
*/
void transportSaveRoutingTable(void);
/**
* @brief Update routing table
* @param node
* @param route
*/
void transportSetRoute(const uint8_t node, const uint8_t route);
/**
* @brief Load route to node
* @param node
* @return route to node
*/
uint8_t transportGetRoute(const uint8_t node);
/**
* @brief Reports content of routing table
*/
void transportReportRoutingTable(void);
/**
* @brief Get node ID
* @return node ID
*/
uint8_t transportGetNodeId(void);
/**
* @brief Get parent node ID
* @return parent node ID
*/
uint8_t transportGetParentNodeId(void);
/**
* @brief Get distance to GW
* @return distance (=hops) to GW
*/
uint8_t transportGetDistanceGW(void);
/**
* @brief Toggle passive mode, i.e. transport does not wait for ACK
* @param OnOff
*/
void transportTogglePassiveMode(const bool OnOff);
/**
* @brief Disable transport, if xxx_POWER_PIN is defined, transport is powered down, else send to sleep
*/
void transportDisable(void);
/**
* @brief Reinitialise transport. Put transport to standby - If xxx_POWER_PIN set, power up and go to standby
*/
void transportReInitialise(void);
/**
* @brief Get transport signal report
* @param command:
* R = RSSI (if available) of incoming @ref I_SIGNAL_REPORT_REQUEST message (from last hop)
* R! = RSSI (if available) of ACK to @ref I_SIGNAL_REPORT_REVERSE message received from last hop
* S = SNR (if available) of incoming @ref I_SIGNAL_REPORT_REQUEST message (from last hop)
* S! = SNR (if available) of ACK to @ref I_SIGNAL_REPORT_REVERSE message received from last hop
* P = TX powerlevel in %
* T = TX powerlevel in dBm
* U = Uplink quality (via ACK from parent node), avg. RSSI
* @return Signal report (if report is not available, INVALID_RSSI, INVALID_SNR, INVALID_PERCENT, or INVALID_LEVEL is sent instead)
*/
int16_t transportSignalReport(const char command) __attribute__((unused));
/**
* @brief Get transport signal report
* @param signalReport
* @return report
*/
int16_t transportGetSignalReport(const signalReport_t signalReport) __attribute__((unused));
#endif // MyTransport_h
/** @}*/