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Tasmota/tasmota/xdrv_23_zigbee_9_impl.ino

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/*
xdrv_23_zigbee.ino - zigbee support for Tasmota
Copyright (C) 2019 Theo Arends and Stephan Hadinger
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/>.
*/
#ifdef USE_ZIGBEE
#define XDRV_23 23
const uint32_t ZIGBEE_BUFFER_SIZE = 256; // Max ZNP frame is SOF+LEN+CMD1+CMD2+250+FCS = 255
const uint8_t ZIGBEE_SOF = 0xFE;
const uint8_t ZIGBEE_SOF_ALT = 0xFF;
//#define Z_USE_SOFTWARE_SERIAL
#ifdef Z_USE_SOFTWARE_SERIAL
#include <SoftwareSerial.h>
SoftwareSerial *ZigbeeSerial = nullptr;
#else
#include <TasmotaSerial.h>
TasmotaSerial *ZigbeeSerial = nullptr;
#endif
const char kZigbeeCommands[] PROGMEM = "|" D_CMND_ZIGBEEZNPSEND "|" D_CMND_ZIGBEE_PERMITJOIN
"|" D_CMND_ZIGBEE_STATUS "|" D_CMND_ZIGBEE_RESET "|" D_CMND_ZIGBEE_ZCL_SEND
"|" D_CMND_ZIGBEE_PROBE "|" D_CMND_ZIGBEE_READ;
void (* const ZigbeeCommand[])(void) PROGMEM = { &CmndZigbeeZNPSend, &CmndZigbeePermitJoin,
&CmndZigbeeStatus, &CmndZigbeeReset, &CmndZigbeeZCLSend,
&CmndZigbeeProbe, &CmndZigbeeRead };
int32_t ZigbeeProcessInput(class SBuffer &buf) {
if (!zigbee.state_machine) { return -1; } // if state machine is stopped, send 'ignore' message
// apply the receive filter, acts as 'startsWith()'
bool recv_filter_match = true;
bool recv_prefix_match = false; // do the first 2 bytes match the response
if ((zigbee.recv_filter) && (zigbee.recv_filter_len > 0)) {
if (zigbee.recv_filter_len >= 2) {
recv_prefix_match = false;
if ( (pgm_read_byte(&zigbee.recv_filter[0]) == buf.get8(0)) &&
(pgm_read_byte(&zigbee.recv_filter[1]) == buf.get8(1)) ) {
recv_prefix_match = true;
}
}
for (uint32_t i = 0; i < zigbee.recv_filter_len; i++) {
if (pgm_read_byte(&zigbee.recv_filter[i]) != buf.get8(i)) {
recv_filter_match = false;
break;
}
}
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("ZIG: ZigbeeProcessInput: recv_prefix_match = %d, recv_filter_match = %d"), recv_prefix_match, recv_filter_match);
}
// if there is a recv_callback, call it now
int32_t res = -1; // default to ok
// res = 0 - proceed to next state
// res > 0 - proceed to the specified state
// res = -1 - silently ignore the message
// res <= -2 - move to error state
// pre-compute the suggested value
if ((zigbee.recv_filter) && (zigbee.recv_filter_len > 0)) {
if (!recv_prefix_match) {
res = -1; // ignore
} else { // recv_prefix_match
if (recv_filter_match) {
res = 0; // ok
} else {
if (zigbee.recv_until) {
res = -1; // ignore until full match
} else {
res = -2; // error, because message is expected but wrong value
}
}
}
} else { // we don't have any filter, ignore message by default
res = -1;
}
if (recv_prefix_match) {
if (zigbee.recv_func) {
res = (*zigbee.recv_func)(res, buf);
}
}
if (-1 == res) {
// if frame was ignored up to now
if (zigbee.recv_unexpected) {
res = (*zigbee.recv_unexpected)(res, buf);
}
}
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("ZIG: ZigbeeProcessInput: res = %d"), res);
// change state accordingly
if (0 == res) {
// if ok, continue execution
zigbee.state_waiting = false;
} else if (res > 0) {
ZigbeeGotoLabel(res); // if >0 then go to specified label
} else if (-1 == res) {
// -1 means ignore message
// just do nothing
} else {
// any other negative value means error
ZigbeeGotoLabel(zigbee.on_error_goto);
}
}
void ZigbeeInput(void)
{
static uint32_t zigbee_polling_window = 0;
static uint8_t fcs = ZIGBEE_SOF;
static uint32_t zigbee_frame_len = 5; // minimal zigbee frame lenght, will be updated when buf[1] is read
// Receive only valid ZNP frames:
// 00 - SOF = 0xFE
// 01 - Length of Data Field - 0..250
// 02 - CMD1 - first byte of command
// 03 - CMD2 - second byte of command
// 04..FD - Data Field
// FE (or last) - FCS Checksum
while (ZigbeeSerial->available()) {
yield();
uint8_t zigbee_in_byte = ZigbeeSerial->read();
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZigbeeInput byte=%d len=%d"), zigbee_in_byte, zigbee_buffer->len());
if (0 == zigbee_buffer->len()) { // make sure all variables are correctly initialized
zigbee_frame_len = 5;
fcs = ZIGBEE_SOF;
// there is a rare race condition when an interrupt occurs when receiving the first byte
// in this case the first bit (lsb) is missed and Tasmota receives 0xFF instead of 0xFE
// We forgive this mistake, and next bytes are automatically resynchronized
if (ZIGBEE_SOF_ALT == zigbee_in_byte) {
AddLog_P2(LOG_LEVEL_INFO, PSTR("ZigbeeInput forgiven first byte %02X (only for statistics)"), zigbee_in_byte);
zigbee_in_byte = ZIGBEE_SOF;
}
}
if ((0 == zigbee_buffer->len()) && (ZIGBEE_SOF != zigbee_in_byte)) {
// waiting for SOF (Start Of Frame) byte, discard anything else
AddLog_P2(LOG_LEVEL_INFO, PSTR("ZigbeeInput discarding byte %02X"), zigbee_in_byte);
continue; // discard
}
if (zigbee_buffer->len() < zigbee_frame_len) {
zigbee_buffer->add8(zigbee_in_byte);
zigbee_polling_window = millis(); // Wait for more data
fcs ^= zigbee_in_byte;
}
if (zigbee_buffer->len() >= zigbee_frame_len) {
zigbee_polling_window = 0; // Publish now
break;
}
// recalculate frame length
if (02 == zigbee_buffer->len()) {
// We just received the Lenght byte
uint8_t len_byte = zigbee_buffer->get8(1);
if (len_byte > 250) len_byte = 250; // ZNP spec says len is 250 max
zigbee_frame_len = len_byte + 5; // SOF + LEN + CMD1 + CMD2 + FCS = 5 bytes overhead
}
}
if (zigbee_buffer->len() && (millis() > (zigbee_polling_window + ZIGBEE_POLLING))) {
char hex_char[(zigbee_buffer->len() * 2) + 2];
ToHex_P((unsigned char*)zigbee_buffer->getBuffer(), zigbee_buffer->len(), hex_char, sizeof(hex_char));
#ifndef Z_USE_SOFTWARE_SERIAL
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("ZIG: Bytes follor_read_metric = %0d"), ZigbeeSerial->getLoopReadMetric());
#endif
// buffer received, now check integrity
if (zigbee_buffer->len() != zigbee_frame_len) {
// Len is not correct, log and reject frame
AddLog_P2(LOG_LEVEL_INFO, PSTR(D_JSON_ZIGBEEZNPRECEIVED ": received frame of wrong size %s, len %d, expected %d"), hex_char, zigbee_buffer->len(), zigbee_frame_len);
} else if (0x00 != fcs) {
// FCS is wrong, packet is corrupt, log and reject frame
AddLog_P2(LOG_LEVEL_INFO, PSTR(D_JSON_ZIGBEEZNPRECEIVED ": received bad FCS frame %s, %d"), hex_char, fcs);
} else {
// frame is correct
AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_JSON_ZIGBEEZNPRECEIVED ": received correct frame %s"), hex_char);
SBuffer znp_buffer = zigbee_buffer->subBuffer(2, zigbee_frame_len - 3); // remove SOF, LEN and FCS
#ifdef ZIGBEE_VERBOSE
ToHex_P((unsigned char*)znp_buffer.getBuffer(), znp_buffer.len(), hex_char, sizeof(hex_char));
Response_P(PSTR("{\"" D_JSON_ZIGBEEZNPRECEIVED "\":\"%s\"}"), hex_char);
MqttPublishPrefixTopic_P(RESULT_OR_TELE, PSTR(D_JSON_ZIGBEEZNPRECEIVED));
XdrvRulesProcess();
#endif
// now process the message
ZigbeeProcessInput(znp_buffer);
}
zigbee_buffer->setLen(0); // empty buffer
}
}
/********************************************************************************************/
void ZigbeeInit(void)
{
zigbee.active = false;
if ((pin[GPIO_ZIGBEE_RX] < 99) && (pin[GPIO_ZIGBEE_TX] < 99)) {
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("Zigbee: GPIOs Rx:%d Tx:%d"), pin[GPIO_ZIGBEE_RX], pin[GPIO_ZIGBEE_TX]);
#ifdef Z_USE_SOFTWARE_SERIAL
ZigbeeSerial = new SoftwareSerial();
ZigbeeSerial->begin(115200, pin[GPIO_ZIGBEE_RX], pin[GPIO_ZIGBEE_TX], SWSERIAL_8N1, false, 256); // ZNP is 115200, RTS/CTS (ignored), 8N1
ZigbeeSerial->enableIntTx(false);
zigbee_buffer = new SBuffer(ZIGBEE_BUFFER_SIZE);
#else
ZigbeeSerial = new TasmotaSerial(pin[GPIO_ZIGBEE_RX], pin[GPIO_ZIGBEE_TX], 0, 0, 256); // set a receive buffer of 256 bytes
ZigbeeSerial->begin(115200);
if (ZigbeeSerial->hardwareSerial()) {
ClaimSerial();
zigbee_buffer = new PreAllocatedSBuffer(sizeof(serial_in_buffer), serial_in_buffer);
} else {
zigbee_buffer = new SBuffer(ZIGBEE_BUFFER_SIZE);
}
#endif
zigbee.active = true;
zigbee.init_phase = true; // start the state machine
zigbee.state_machine = true; // start the state machine
ZigbeeSerial->flush();
}
}
/*********************************************************************************************\
* Commands
\*********************************************************************************************/
uint32_t strToUInt(const JsonVariant &val) {
// if the string starts with 0x, it is considered Hex, otherwise it is an int
if (val.is<unsigned int>()) {
return val.as<unsigned int>();
} else {
if (val.is<char*>()) {
return strtoull(val.as<char*>(), nullptr, 0);
}
}
return 0; // couldn't parse anything
}
const unsigned char ZIGBEE_FACTORY_RESET[] PROGMEM = "2112000F0100"; // Z_SREQ | Z_SYS, SYS_OSAL_NV_DELETE, 0x0F00 id, 0x0001 len
// Do a factory reset of the CC2530
void CmndZigbeeReset(void) {
if (ZigbeeSerial) {
switch (XdrvMailbox.payload) {
case 1:
ZigbeeZNPSend(ZIGBEE_FACTORY_RESET, sizeof(ZIGBEE_FACTORY_RESET));
restart_flag = 2;
ResponseCmndChar(D_JSON_ZIGBEE_CC2530 " " D_JSON_RESET_AND_RESTARTING);
break;
default:
ResponseCmndChar(D_JSON_ONE_TO_RESET);
}
}
}
void CmndZigbeeStatus(void) {
if (ZigbeeSerial) {
String dump = zigbee_devices.dump(XdrvMailbox.payload);
Response_P(PSTR("{\"%s%d\":%s}"), XdrvMailbox.command, XdrvMailbox.payload, dump.c_str());
}
}
void CmndZigbeeZNPSend(void)
{
if (ZigbeeSerial && (XdrvMailbox.data_len > 0)) {
uint8_t code;
char *codes = RemoveSpace(XdrvMailbox.data);
int32_t size = strlen(XdrvMailbox.data);
SBuffer buf((size+1)/2);
while (size > 1) {
char stemp[3];
strlcpy(stemp, codes, sizeof(stemp));
code = strtol(stemp, nullptr, 16);
buf.add8(code);
size -= 2;
codes += 2;
}
ZigbeeZNPSend(buf.getBuffer(), buf.len());
}
ResponseCmndDone();
}
void ZigbeeZNPSend(const uint8_t *msg, size_t len) {
if ((len < 2) || (len > 252)) {
// abort, message cannot be less than 2 bytes for CMD1 and CMD2
AddLog_P2(LOG_LEVEL_DEBUG, PSTR(D_JSON_ZIGBEEZNPSENT ": bad message len %d"), len);
return;
}
uint8_t data_len = len - 2; // removing CMD1 and CMD2
if (ZigbeeSerial) {
uint8_t fcs = data_len;
ZigbeeSerial->write(ZIGBEE_SOF); // 0xFE
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZNPSend SOF %02X"), ZIGBEE_SOF);
ZigbeeSerial->write(data_len);
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZNPSend LEN %02X"), data_len);
for (uint32_t i = 0; i < len; i++) {
uint8_t b = pgm_read_byte(msg + i);
ZigbeeSerial->write(b);
fcs ^= b;
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZNPSend byt %02X"), b);
}
ZigbeeSerial->write(fcs); // finally send fcs checksum byte
AddLog_P2(LOG_LEVEL_DEBUG_MORE, PSTR("ZNPSend FCS %02X"), fcs);
}
#ifdef ZIGBEE_VERBOSE
// Now send a MQTT message to report the sent message
char hex_char[(len * 2) + 2];
Response_P(PSTR("{\"" D_JSON_ZIGBEEZNPSENT "\":\"%s\"}"),
ToHex_P(msg, len, hex_char, sizeof(hex_char)));
MqttPublishPrefixTopic_P(RESULT_OR_TELE, PSTR(D_JSON_ZIGBEEZNPSENT));
XdrvRulesProcess();
#endif
}
void ZigbeeZCLSend(uint16_t dtsAddr, uint16_t clusterId, uint8_t endpoint, uint8_t cmdId, bool clusterSpecific, const uint8_t *msg, size_t len, bool disableDefResp = true, uint8_t transacId = 1) {
SBuffer buf(25+len);
buf.add8(Z_SREQ | Z_AF); // 24
buf.add8(AF_DATA_REQUEST); // 01
buf.add16(dtsAddr);
buf.add8(endpoint); // dest endpoint
buf.add8(0x01); // source endpoint
buf.add16(clusterId);
buf.add8(transacId); // transacId
buf.add8(0x30); // 30 options
buf.add8(0x1E); // 1E radius
buf.add8(3 + len);
buf.add8((disableDefResp ? 0x10 : 0x00) | (clusterSpecific ? 0x01 : 0x00)); // Frame Control Field
buf.add8(transacId); // Transaction Sequance Number
buf.add8(cmdId);
if (len > 0) {
buf.addBuffer(msg, len); // add the payload
}
ZigbeeZNPSend(buf.getBuffer(), buf.len());
}
inline int8_t hexValue(char c) {
if ((c >= '0') && (c <= '9')) {
return c - '0';
}
if ((c >= 'A') && (c <= 'F')) {
return 10 + c - 'A';
}
if ((c >= 'a') && (c <= 'f')) {
return 10 + c - 'a';
}
return -1;
}
uint32_t parseHex(const char **data, size_t max_len = 8) {
uint32_t ret = 0;
for (uint32_t i = 0; i < max_len; i++) {
int8_t v = hexValue(**data);
if (v < 0) { break; } // non hex digit, we stop parsing
ret = (ret << 4) | v;
*data += 1;
}
return ret;
}
void CmndZigbeeZCLSend(void) {
char parm_uc[12]; // used to convert JSON keys to uppercase
// ZigbeeZCLSend { "dst":"0x1234", "endpoint":"0x01", "cmd":"AABBCC" }
char dataBufUc[XdrvMailbox.data_len];
UpperCase(dataBufUc, XdrvMailbox.data);
RemoveSpace(dataBufUc);
if (strlen(dataBufUc) < 8) { ResponseCmndChar(D_JSON_INVALID_JSON); return; }
DynamicJsonBuffer jsonBuf;
JsonObject &json = jsonBuf.parseObject(dataBufUc);
if (!json.success()) { ResponseCmndChar(D_JSON_INVALID_JSON); return; }
// params
uint16_t dstAddr = 0xFFFF; // 0xFFFF is braodcast, so considered invalid
uint16_t clusterId = 0x0000; // 0x0000 is a valid default value
uint8_t endpoint = 0x00; // 0x00 is invalid for the dst endpoint
uint8_t cmd = ZCL_READ_ATTRIBUTES; // default command is READ_ATTRIBUTES
bool clusterSpecific = false;
const char* data = ""; // empty string is valid
UpperCase_P(parm_uc, PSTR("device"));
if (json.containsKey(parm_uc)) { dstAddr = strToUInt(json[parm_uc]); }
UpperCase_P(parm_uc, PSTR("endpoint"));
if (json.containsKey(parm_uc)) { endpoint = strToUInt(json[parm_uc]); }
UpperCase_P(parm_uc, PSTR("cmd"));
if (json.containsKey(parm_uc)) { data = json[parm_uc].as<const char*>(); }
// Parse 'cmd' in the form "AAAA_BB/CCCCCCCC" or "AAAA!BB/CCCCCCCC"
// where AA is the cluster number, BBBB the command number, CCCC... the payload
// First delimiter is '_' for a global command, or '!' for a cluster specific commanc
clusterId = parseHex(&data, 4);
// delimiter
if (('_' == *data) || ('!' == *data)) {
if ('!' == *data) { clusterSpecific = true; }
data++;
} else {
ResponseCmndChar("Wrong delimiter for payload");
return;
}
// parse cmd number
cmd = parseHex(&data, 2);
// move to end of payload
// delimiter is optional
if ('/' == *data) { data++; } // skip delimiter
size_t size = strlen(data);
SBuffer buf((size+2)/2); // actual bytes buffer for data
while (*data) {
uint8_t code = parseHex(&data, 2);
buf.add8(code);
}
if (0 == endpoint) {
// endpoint is not specified, let's try to find it from shortAddr
endpoint = zigbee_devices.findClusterEndpointIn(dstAddr, clusterId);
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("CmndZigbeeZCLSend: guessing endpoint 0x%02X"), endpoint);
}
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("CmndZigbeeZCLSend: dstAddr 0x%04X, cluster 0x%04X, endpoint 0x%02X, cmd 0x%02X, data %s"),
dstAddr, clusterId, endpoint, cmd, data);
if (0 == endpoint) {
AddLog_P2(LOG_LEVEL_INFO, PSTR("CmndZigbeeZCLSend: unspecified endpoint"));
return;
}
// everything is good, we can send the command
ZigbeeZCLSend(dstAddr, clusterId, endpoint, cmd, clusterSpecific, buf.getBuffer(), buf.len());
ResponseCmndDone();
}
// Probe a specific device to get its endpoints and supported clusters
void CmndZigbeeProbe(void) {
char dataBufUc[XdrvMailbox.data_len];
UpperCase(dataBufUc, XdrvMailbox.data);
RemoveSpace(dataBufUc);
if (strlen(dataBufUc) < 3) { ResponseCmndChar("Invalid destination"); return; }
// TODO, for now ignore friendly names
uint16_t shortaddr = strtoull(dataBufUc, nullptr, 0);
AddLog_P2(LOG_LEVEL_DEBUG, PSTR("CmndZigbeeScan: short addr 0x%04X"), shortaddr);
// everything is good, we can send the command
Z_SendActiveEpReq(shortaddr);
ResponseCmndDone();
}
// Send an attribute read command to a device, specifying cluster and list of attributes
void CmndZigbeeRead(void) {
char parm_uc[12]; // used to convert JSON keys to uppercase
// ZigbeeRead {"Device":"0xF289","Cluster":0,"Endpoint":3,"Attr":5}
// ZigbeeRead {"Device":"0xF289","Cluster":"0x0000","Endpoint":"0x0003","Attr":"0x0005"}
// ZigbeeRead {"Device":"0xF289","Cluster":0,"Endpoint":3,"Attr":[5,6,7,4]}
char dataBufUc[XdrvMailbox.data_len];
UpperCase(dataBufUc, XdrvMailbox.data);
RemoveSpace(dataBufUc);
if (strlen(dataBufUc) < 8) { ResponseCmndChar(D_JSON_INVALID_JSON); return; }
DynamicJsonBuffer jsonBuf;
JsonObject &json = jsonBuf.parseObject(dataBufUc);
if (!json.success()) { ResponseCmndChar(D_JSON_INVALID_JSON); return; }
// params
uint16_t dstAddr = 0x0000; // default to local address
uint16_t cluster = 0x0000; // default to general clsuter
uint8_t endpoint = 0x00; // 0x00 is invalid for the dst endpoint
size_t attrs_len = 0;
uint8_t* attrs = nullptr; // empty string is valid
dstAddr = strToUInt(json[UpperCase_P(parm_uc, PSTR("device"))]);
endpoint = strToUInt(json[UpperCase_P(parm_uc, PSTR("endpoint"))]);
cluster = strToUInt(json[UpperCase_P(parm_uc, PSTR("cluster"))]);
UpperCase_P(parm_uc, PSTR("Attr"));
if (json.containsKey(parm_uc)) {
const JsonVariant& attr_data = json[parm_uc];
if (attr_data.is<JsonArray>()) {
JsonArray& attr_arr = attr_data;
attrs_len = attr_arr.size() * 2;
attrs = new uint8_t[attrs_len];
uint32_t i = 0;
for (auto value : attr_arr) {
uint16_t val = strToUInt(value);
attrs[i++] = val & 0xFF;
attrs[i++] = val >> 8;
}
} else {
attrs_len = 2;
attrs = new uint8_t[attrs_len];
uint16_t val = strToUInt(attr_data);
attrs[0] = val & 0xFF; // little endian
attrs[1] = val >> 8;
}
}
ZigbeeZCLSend(dstAddr, cluster, endpoint, ZCL_READ_ATTRIBUTES, false, attrs, attrs_len, false /* we do want a response */);
if (attrs) { delete[] attrs; }
}
// Allow or Deny pairing of new Zigbee devices
void CmndZigbeePermitJoin(void)
{
uint32_t payload = XdrvMailbox.payload;
if (payload < 0) { payload = 0; }
if ((99 != payload) && (payload > 1)) { payload = 1; }
if (1 == payload) {
ZigbeeGotoLabel(ZIGBEE_LABEL_PERMIT_JOIN_OPEN_60);
} else if (99 == payload){
ZigbeeGotoLabel(ZIGBEE_LABEL_PERMIT_JOIN_OPEN_XX);
} else {
ZigbeeGotoLabel(ZIGBEE_LABEL_PERMIT_JOIN_CLOSE);
}
ResponseCmndDone();
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xdrv23(uint8_t function)
{
bool result = false;
if (zigbee.active) {
switch (function) {
case FUNC_LOOP:
if (ZigbeeSerial) { ZigbeeInput(); }
if (zigbee.state_machine) {
//ZigbeeStateMachine();
ZigbeeStateMachine_Run();
}
break;
case FUNC_PRE_INIT:
ZigbeeInit();
break;
case FUNC_COMMAND:
result = DecodeCommand(kZigbeeCommands, ZigbeeCommand);
break;
}
}
return result;
}
#endif // USE_ZIGBEE
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