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Tasmota/sonoff/xdrv_06_snfbridge.ino

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/*
xdrv_06_snfbridge.ino - sonoff RF bridge 433 support for Sonoff-Tasmota
Copyright (C) 2018 Theo Arends and Erik Andrén Zachrisson (fw update)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*********************************************************************************************\
Sonoff RF Bridge 433
\*********************************************************************************************/
#define XDRV_06 6
#define SFB_TIME_AVOID_DUPLICATE 2000 // Milliseconds
enum SonoffBridgeCommands {
CMND_RFSYNC, CMND_RFLOW, CMND_RFHIGH, CMND_RFHOST, CMND_RFCODE, CMND_RFKEY, CMND_RFRAW };
const char kSonoffBridgeCommands[] PROGMEM =
D_CMND_RFSYNC "|" D_CMND_RFLOW "|" D_CMND_RFHIGH "|" D_CMND_RFHOST "|" D_CMND_RFCODE "|" D_CMND_RFKEY "|" D_CMND_RFRAW;
uint8_t sonoff_bridge_receive_flag = 0;
uint8_t sonoff_bridge_receive_raw_flag = 0;
uint8_t sonoff_bridge_learn_key = 1;
uint8_t sonoff_bridge_learn_active = 0;
uint8_t sonoff_bridge_expected_bytes = 0;
uint32_t sonoff_bridge_last_received_id = 0;
uint32_t sonoff_bridge_last_send_code = 0;
unsigned long sonoff_bridge_last_time = 0;
unsigned long sonoff_bridge_last_learn_time = 0;
#ifdef USE_RF_FLASH
/*********************************************************************************************\
* EFM8BB1 RF microcontroller in-situ firmware update
*
* Enables upload of EFM8BB1 firmware provided by https://github.com/Portisch/RF-Bridge-EFM8BB1 using the web gui.
* Based on source by Erik Andrén Zachrisson (https://github.com/arendst/Sonoff-Tasmota/pull/2886)
\*********************************************************************************************/
#include "ihx.h"
#include "c2.h"
#define RF_RECORD_NO_START_FOUND -1
#define RF_RECORD_NO_END_FOUND -2
ssize_t rf_find_hex_record_start(uint8_t *buf, size_t size)
{
for (size_t i = 0; i < size; i++) {
if (buf[i] == ':') {
return i;
}
}
return RF_RECORD_NO_START_FOUND;
}
ssize_t rf_find_hex_record_end(uint8_t *buf, size_t size)
{
for (size_t i = 0; i < size; i++) {
if (buf[i] == '\n') {
return i;
}
}
return RF_RECORD_NO_END_FOUND;
}
ssize_t rf_glue_remnant_with_new_data_and_write(const uint8_t *remnant_data, uint8_t *new_data, size_t new_data_len)
{
ssize_t record_start;
ssize_t record_end;
ssize_t glue_record_sz;
uint8_t *glue_buf;
ssize_t result;
if (remnant_data[0] != ':') { return -8; } // File invalid - RF Remnant data did not start with a start token
// Find end token in new data
record_end = rf_find_hex_record_end(new_data, new_data_len);
record_start = rf_find_hex_record_start(new_data, new_data_len);
// Be paranoid and check that there is no start marker before the end record
// If so this implies that there was something wrong with the last start marker saved
// in the last upload part
if ((record_start != RF_RECORD_NO_START_FOUND) && (record_start < record_end)) {
return -8; // File invalid - Unexpected RF start marker found before RF end marker
}
glue_record_sz = strlen((const char *) remnant_data) + record_end;
glue_buf = (uint8_t *) malloc(glue_record_sz);
if (glue_buf == NULL) { return -2; } // Not enough space
// Assemble new glue buffer
memcpy(glue_buf, remnant_data, strlen((const char *) remnant_data));
memcpy(glue_buf + strlen((const char *) remnant_data), new_data, record_end);
result = rf_decode_and_write(glue_buf, glue_record_sz);
free(glue_buf);
return result;
}
ssize_t rf_decode_and_write(uint8_t *record, size_t size)
{
uint8_t err = ihx_decode(record, size);
if (err != IHX_SUCCESS) { return -13; } // Failed to decode RF firmware
ihx_t *h = (ihx_t *) record;
if (h->record_type == IHX_RT_DATA) {
int retries = 5;
uint16_t address = h->address_high * 0x100 + h->address_low;
do {
err = c2_programming_init();
err = c2_block_write(address, h->data, h->len);
} while (err != C2_SUCCESS && retries--);
} else if (h->record_type == IHX_RT_END_OF_FILE) {
// RF firmware upgrade done, restarting RF chip
err = c2_reset();
}
if (err != C2_SUCCESS) { return -12; } // Failed to write to RF chip
return 0;
}
ssize_t rf_search_and_write(uint8_t *buf, size_t size)
{
// Binary contains a set of commands, decode and program each one
ssize_t rec_end;
ssize_t rec_start;
ssize_t err;
for (size_t i = 0; i < size; i++) {
// Find starts and ends of commands
rec_start = rf_find_hex_record_start(buf + i, size - i);
if (rec_start == RF_RECORD_NO_START_FOUND) {
// There is nothing left to save in this buffer
return -8; // File invalid
}
// Translate rec_start from local buffer position to chunk position
rec_start += i;
rec_end = rf_find_hex_record_end(buf + rec_start, size - rec_start);
if (rec_end == RF_RECORD_NO_END_FOUND) {
// We have found a start but not an end, save remnant
return rec_start;
}
// Translate rec_end from local buffer position to chunk position
rec_end += rec_start;
err = rf_decode_and_write(buf + rec_start, rec_end - rec_start);
if (err < 0) { return err; }
i = rec_end;
}
// Buffer was perfectly aligned, start and end found without any remaining trailing characters
return 0;
}
uint8_t rf_erase_flash(void)
{
uint8_t err;
for (int i = 0; i < 4; i++) { // HACK: Try multiple times as the command sometimes fails (unclear why)
err = c2_programming_init();
if (err != C2_SUCCESS) {
return 10; // Failed to init RF chip
}
err = c2_device_erase();
if (err != C2_SUCCESS) {
if (i < 3) {
c2_reset(); // Reset RF chip and try again
} else {
return 11; // Failed to erase RF chip
}
} else {
break;
}
}
return 0;
}
uint8_t SnfBrUpdateInit(void)
{
pinMode(PIN_C2CK, OUTPUT);
pinMode(PIN_C2D, INPUT);
return rf_erase_flash(); // 10, 11
}
#endif // USE_RF_FLASH
/********************************************************************************************/
void SonoffBridgeReceivedRaw(void)
{
// Decoding according to https://github.com/Portisch/RF-Bridge-EFM8BB1
uint8_t buckets = 0;
if (0xB1 == serial_in_buffer[1]) { buckets = serial_in_buffer[2] << 1; } // Bucket sniffing
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"" D_CMND_RFRAW "\":{\"" D_JSON_DATA "\":\""));
for (int i = 0; i < serial_in_byte_counter; i++) {
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s%02X"), mqtt_data, serial_in_buffer[i]);
if (0xB1 == serial_in_buffer[1]) {
if ((i > 3) && buckets) { buckets--; }
if ((i < 3) || (buckets % 2) || (i == serial_in_byte_counter -2)) {
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s "), mqtt_data);
}
}
}
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("%s\"}}"), mqtt_data);
MqttPublishPrefixTopic_P(RESULT_OR_TELE, PSTR(D_CMND_RFRAW));
XdrvRulesProcess();
}
/********************************************************************************************/
void SonoffBridgeLearnFailed(void)
{
sonoff_bridge_learn_active = 0;
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, D_CMND_RFKEY, sonoff_bridge_learn_key, D_JSON_LEARN_FAILED);
MqttPublishPrefixTopic_P(RESULT_OR_STAT, PSTR(D_CMND_RFKEY));
}
void SonoffBridgeReceived(void)
{
uint16_t sync_time = 0;
uint16_t low_time = 0;
uint16_t high_time = 0;
uint32_t received_id = 0;
char rfkey[8];
char stemp[16];
AddLogSerial(LOG_LEVEL_DEBUG);
if (0xA2 == serial_in_buffer[0]) { // Learn timeout
SonoffBridgeLearnFailed();
}
else if (0xA3 == serial_in_buffer[0]) { // Learned A3 20 F8 01 18 03 3E 2E 1A 22 55
sonoff_bridge_learn_active = 0;
low_time = serial_in_buffer[3] << 8 | serial_in_buffer[4]; // Low time in uSec
high_time = serial_in_buffer[5] << 8 | serial_in_buffer[6]; // High time in uSec
if (low_time && high_time) {
for (byte i = 0; i < 9; i++) {
Settings.rf_code[sonoff_bridge_learn_key][i] = serial_in_buffer[i +1];
}
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, D_CMND_RFKEY, sonoff_bridge_learn_key, D_JSON_LEARNED);
MqttPublishPrefixTopic_P(RESULT_OR_STAT, PSTR(D_CMND_RFKEY));
} else {
SonoffBridgeLearnFailed();
}
}
else if (0xA4 == serial_in_buffer[0]) { // Received RF data A4 20 EE 01 18 03 3E 2E 1A 22 55
if (sonoff_bridge_learn_active) {
SonoffBridgeLearnFailed();
} else {
sync_time = serial_in_buffer[1] << 8 | serial_in_buffer[2]; // Sync time in uSec
low_time = serial_in_buffer[3] << 8 | serial_in_buffer[4]; // Low time in uSec
high_time = serial_in_buffer[5] << 8 | serial_in_buffer[6]; // High time in uSec
received_id = serial_in_buffer[7] << 16 | serial_in_buffer[8] << 8 | serial_in_buffer[9];
unsigned long now = millis();
if (!((received_id == sonoff_bridge_last_received_id) && (now - sonoff_bridge_last_time < SFB_TIME_AVOID_DUPLICATE))) {
sonoff_bridge_last_received_id = received_id;
sonoff_bridge_last_time = now;
strncpy_P(rfkey, PSTR("\"" D_JSON_NONE "\""), sizeof(rfkey));
for (byte i = 1; i <= 16; i++) {
if (Settings.rf_code[i][0]) {
uint32_t send_id = Settings.rf_code[i][6] << 16 | Settings.rf_code[i][7] << 8 | Settings.rf_code[i][8];
if (send_id == received_id) {
snprintf_P(rfkey, sizeof(rfkey), PSTR("%d"), i);
break;
}
}
}
if (Settings.flag.rf_receive_decimal) {
snprintf_P(stemp, sizeof(stemp), PSTR("%u"), received_id);
} else {
snprintf_P(stemp, sizeof(stemp), PSTR("\"%06X\""), received_id);
}
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"" D_JSON_RFRECEIVED "\":{\"" D_JSON_SYNC "\":%d,\"" D_JSON_LOW "\":%d,\"" D_JSON_HIGH "\":%d,\"" D_JSON_DATA "\":%s,\"" D_CMND_RFKEY "\":%s}}"),
sync_time, low_time, high_time, stemp, rfkey);
MqttPublishPrefixTopic_P(RESULT_OR_TELE, PSTR(D_JSON_RFRECEIVED));
XdrvRulesProcess();
#ifdef USE_DOMOTICZ
DomoticzSensor(DZ_COUNT, received_id); // Send rid as Domoticz Counter value
#endif // USE_DOMOTICZ
}
}
}
}
boolean SonoffBridgeSerialInput(void)
{
// iTead Rf Universal Transceiver Module Serial Protocol Version 1.0 (20170420)
static int8_t receive_len = 0;
if (sonoff_bridge_receive_flag) {
if (sonoff_bridge_receive_raw_flag) {
if (!serial_in_byte_counter) {
serial_in_buffer[serial_in_byte_counter++] = 0xAA;
}
serial_in_buffer[serial_in_byte_counter++] = serial_in_byte;
if (serial_in_byte_counter == 3) {
if ((0xA6 == serial_in_buffer[1]) || (0xAB == serial_in_buffer[1])) { // AA A6 06 023908010155 55 - 06 is receive_len
receive_len = serial_in_buffer[2] + 4; // Get at least receive_len bytes
}
}
if ((!receive_len && (0x55 == serial_in_byte)) || (receive_len && (serial_in_byte_counter == receive_len))) { // 0x55 - End of text
SonoffBridgeReceivedRaw();
sonoff_bridge_receive_flag = 0;
return 1;
}
}
else if (!((0 == serial_in_byte_counter) && (0 == serial_in_byte))) { // Skip leading 0
if (0 == serial_in_byte_counter) {
sonoff_bridge_expected_bytes = 2; // 0xA0, 0xA1, 0xA2
if (serial_in_byte >= 0xA3) {
sonoff_bridge_expected_bytes = 11; // 0xA3, 0xA4, 0xA5
}
if (serial_in_byte == 0xA6) {
sonoff_bridge_expected_bytes = 0; // 0xA6 and up supported by Portisch firmware only
serial_in_buffer[serial_in_byte_counter++] = 0xAA;
sonoff_bridge_receive_raw_flag = 1;
}
}
serial_in_buffer[serial_in_byte_counter++] = serial_in_byte;
if ((sonoff_bridge_expected_bytes == serial_in_byte_counter) && (0x55 == serial_in_byte)) { // 0x55 - End of text
SonoffBridgeReceived();
sonoff_bridge_receive_flag = 0;
return 1;
}
}
serial_in_byte = 0;
}
if (0xAA == serial_in_byte) { // 0xAA - Start of text
serial_in_byte_counter = 0;
serial_in_byte = 0;
sonoff_bridge_receive_flag = 1;
receive_len = 0;
}
return 0;
}
void SonoffBridgeSendCommand(byte code)
{
Serial.write(0xAA); // Start of Text
Serial.write(code); // Command or Acknowledge
Serial.write(0x55); // End of Text
}
void SonoffBridgeSendAck(void)
{
Serial.write(0xAA); // Start of Text
Serial.write(0xA0); // Acknowledge
Serial.write(0x55); // End of Text
}
void SonoffBridgeSendCode(uint32_t code)
{
Serial.write(0xAA); // Start of Text
Serial.write(0xA5); // Send following code
for (byte i = 0; i < 6; i++) {
Serial.write(Settings.rf_code[0][i]);
}
Serial.write((code >> 16) & 0xff);
Serial.write((code >> 8) & 0xff);
Serial.write(code & 0xff);
Serial.write(0x55); // End of Text
Serial.flush();
}
void SonoffBridgeSend(uint8_t idx, uint8_t key)
{
uint8_t code;
key--; // Support 1 to 16
Serial.write(0xAA); // Start of Text
Serial.write(0xA5); // Send following code
for (byte i = 0; i < 8; i++) {
Serial.write(Settings.rf_code[idx][i]);
}
if (0 == idx) {
code = (0x10 << (key >> 2)) | (1 << (key & 3)); // 11,12,14,18,21,22,24,28,41,42,44,48,81,82,84,88
} else {
code = Settings.rf_code[idx][8];
}
Serial.write(code);
Serial.write(0x55); // End of Text
Serial.flush();
#ifdef USE_DOMOTICZ
// uint32_t rid = Settings.rf_code[idx][6] << 16 | Settings.rf_code[idx][7] << 8 | code;
// DomoticzSensor(DZ_COUNT, rid); // Send rid as Domoticz Counter value
#endif // USE_DOMOTICZ
}
void SonoffBridgeLearn(uint8_t key)
{
sonoff_bridge_learn_key = key;
sonoff_bridge_learn_active = 1;
sonoff_bridge_last_learn_time = millis();
Serial.write(0xAA); // Start of Text
Serial.write(0xA1); // Start learning
Serial.write(0x55); // End of Text
}
/*********************************************************************************************\
* Commands
\*********************************************************************************************/
boolean SonoffBridgeCommand(void)
{
char command [CMDSZ];
boolean serviced = true;
int command_code = GetCommandCode(command, sizeof(command), XdrvMailbox.topic, kSonoffBridgeCommands);
if (-1 == command_code) {
serviced = false; // Unknown command
}
else if ((command_code >= CMND_RFSYNC) && (command_code <= CMND_RFCODE)) { // RfSync, RfLow, RfHigh, RfHost and RfCode
char *p;
char stemp [10];
uint32_t code = 0;
uint8_t radix = 10;
uint8_t set_index = command_code *2;
if (XdrvMailbox.data[0] == '#') {
XdrvMailbox.data++;
XdrvMailbox.data_len--;
radix = 16;
}
if (XdrvMailbox.data_len) {
code = strtol(XdrvMailbox.data, &p, radix);
if (code) {
if (CMND_RFCODE == command_code) {
sonoff_bridge_last_send_code = code;
SonoffBridgeSendCode(code);
} else {
if (1 == XdrvMailbox.payload) {
code = pgm_read_byte(kDefaultRfCode + set_index) << 8 | pgm_read_byte(kDefaultRfCode + set_index +1);
}
uint8_t msb = code >> 8;
uint8_t lsb = code & 0xFF;
if ((code > 0) && (code < 0x7FFF) && (msb != 0x55) && (lsb != 0x55)) { // Check for End of Text codes
Settings.rf_code[0][set_index] = msb;
Settings.rf_code[0][set_index +1] = lsb;
}
}
}
}
if (CMND_RFCODE == command_code) {
code = sonoff_bridge_last_send_code;
} else {
code = Settings.rf_code[0][set_index] << 8 | Settings.rf_code[0][set_index +1];
}
if (10 == radix) {
snprintf_P(stemp, sizeof(stemp), PSTR("%d"), code);
} else {
snprintf_P(stemp, sizeof(stemp), PSTR("\"#%X\""), code);
}
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_XVALUE, command, stemp);
}
else if ((CMND_RFKEY == command_code) && (XdrvMailbox.index > 0) && (XdrvMailbox.index <= 16)) {
unsigned long now = millis();
if ((!sonoff_bridge_learn_active) || (now - sonoff_bridge_last_learn_time > 60100)) {
sonoff_bridge_learn_active = 0;
if (2 == XdrvMailbox.payload) { // Learn RF data
SonoffBridgeLearn(XdrvMailbox.index);
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_START_LEARNING);
}
else if (3 == XdrvMailbox.payload) { // Unlearn RF data
Settings.rf_code[XdrvMailbox.index][0] = 0; // Reset sync_time MSB
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_SET_TO_DEFAULT);
}
else if (4 == XdrvMailbox.payload) { // Save RF data provided by RFSync, RfLow, RfHigh and last RfCode
for (byte i = 0; i < 6; i++) {
Settings.rf_code[XdrvMailbox.index][i] = Settings.rf_code[0][i];
}
Settings.rf_code[XdrvMailbox.index][6] = (sonoff_bridge_last_send_code >> 16) & 0xff;
Settings.rf_code[XdrvMailbox.index][7] = (sonoff_bridge_last_send_code >> 8) & 0xff;
Settings.rf_code[XdrvMailbox.index][8] = sonoff_bridge_last_send_code & 0xff;
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_SAVED);
} else if (5 == XdrvMailbox.payload) { // Show default or learned RF data
uint8_t key = XdrvMailbox.index;
uint8_t index = (0 == Settings.rf_code[key][0]) ? 0 : key; // Use default if sync_time MSB = 0
uint16_t sync_time = (Settings.rf_code[index][0] << 8) | Settings.rf_code[index][1];
uint16_t low_time = (Settings.rf_code[index][2] << 8) | Settings.rf_code[index][3];
uint16_t high_time = (Settings.rf_code[index][4] << 8) | Settings.rf_code[index][5];
uint32_t code = (Settings.rf_code[index][6] << 16) | (Settings.rf_code[index][7] << 8);
if (0 == index) {
key--;
code |= (uint8_t)((0x10 << (key >> 2)) | (1 << (key & 3)));
} else {
code |= Settings.rf_code[index][8];
}
snprintf_P(mqtt_data, sizeof(mqtt_data), PSTR("{\"%s%d\":{\"" D_JSON_SYNC "\":%d,\"" D_JSON_LOW "\":%d,\"" D_JSON_HIGH "\":%d,\"" D_JSON_DATA "\":\"%06X\"}}"),
command, XdrvMailbox.index, sync_time, low_time, high_time, code);
} else {
if ((1 == XdrvMailbox.payload) || (0 == Settings.rf_code[XdrvMailbox.index][0])) { // Test sync_time MSB
SonoffBridgeSend(0, XdrvMailbox.index); // Send default RF data
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_DEFAULT_SENT);
} else {
SonoffBridgeSend(XdrvMailbox.index, 0); // Send learned RF data
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, XdrvMailbox.index, D_JSON_LEARNED_SENT);
}
}
} else {
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_INDEX_SVALUE, command, sonoff_bridge_learn_key, D_JSON_LEARNING_ACTIVE);
}
}
else if (CMND_RFRAW == command_code) {
if (XdrvMailbox.data_len) {
if (XdrvMailbox.data_len < 6) { // On, Off
switch (XdrvMailbox.payload) {
case 0: // Receive Raw Off
SonoffBridgeSendCommand(0xA7); // Stop reading RF signals enabling iTead default RF handling
case 1: // Receive Raw On
sonoff_bridge_receive_raw_flag = XdrvMailbox.payload;
break;
case 166: // 0xA6 - Start reading RF signals disabling iTead default RF handling
case 167: // 0xA7 - Stop reading RF signals enabling iTead default RF handling
case 169: // 0xA9 - Start learning predefined protocols
case 176: // 0xB0 - Stop sniffing
case 177: // 0xB1 - Start sniffing
case 255: // 0xFF - Show firmware version
SonoffBridgeSendCommand(XdrvMailbox.payload);
sonoff_bridge_receive_raw_flag = 1;
break;
case 192: // 0xC0 - Beep
char beep[] = "AAC000C055\0";
SerialSendRaw(beep);
break;
}
} else {
SerialSendRaw(RemoveSpace(XdrvMailbox.data));
sonoff_bridge_receive_raw_flag = 1;
}
}
snprintf_P(mqtt_data, sizeof(mqtt_data), S_JSON_COMMAND_SVALUE, command, GetStateText(sonoff_bridge_receive_raw_flag));
} else serviced = false; // Unknown command
return serviced;
}
/*********************************************************************************************/
void SonoffBridgeInit(void)
{
sonoff_bridge_receive_raw_flag = 0;
SonoffBridgeSendCommand(0xA7); // Stop reading RF signals enabling iTead default RF handling
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
boolean Xdrv06(byte function)
{
boolean result = false;
if (SONOFF_BRIDGE == Settings.module) {
switch (function) {
case FUNC_INIT:
SonoffBridgeInit();
break;
case FUNC_COMMAND:
result = SonoffBridgeCommand();
break;
case FUNC_SERIAL:
result = SonoffBridgeSerialInput();
break;
}
}
return result;
}
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