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Log đây a ạ:
+CMQTTRXEND: 1 AT+CMQTTTOPIC=1,54 > Pump is on I (60414) AT_CMD: REC: +CMQTTRXSTART: 1,58,17 +CMQTTRXTOPIC: 1,58 messages/173a5e39-7c5b-400e-8d53-a0a0292d5e9d/control_pump +CMQTTRXPAYLOAD: 1,17 { “status”:true } +CMQTTRXEND: 1 I (60554) AT_CMD: REC: +CMQTTRXSTART: 1,58,17 +CMQTTRXTOPIC: 1,58 messages/173a5e39-7c5b-400e-8d53-a0a0292d5e9d/control_pump +CMQTTRXPAYLOAD: 1,17 { “status”:true } +CMQTTRXEND: 1 I (60724) AT_CMD: REC: +CMQTTRXSTART: 1,58,17 +CMQTTRXTOPIC: 1,58 messages/173a5e39-7c5b-400e-8d53-a0a0292d5e9d/control_pump +CMQTTRXPAYLOAD: 1,17 { “status”:true } +CMQTTRXEND: 1 I (60944) AT_CMD: REC: +CMQTTRXSTART: 1,58,17 +CMQTTRXTOPIC: 1,58 messages/173a5e39-7c5b-400e-8d53-a0a0292d5e9d/control_pump +CMQTTRXPAYLOAD: 1,17 { “status”:true } +CMQTTRXEND: 1 Pump is on I (61294) AT_CMD: Send: AT+CMQTTTOPIC=1,54 I (62394) AT_CMD: Send: AT+CMQTTTOPIC=1,54 I (62594) AT_CMD: REC: +CMQTTRXSTART: 1,58,17 +CMQTTRXTOPIC: 1,58 messages/173a5e39-7c5b-400e-8d53-a0a0292d5e9d/control_pump +CMQTTRXPAYLOAD: 1,17 { “status”:true } +CMQTTRXEND: 1 +CMQTTRXSTART: 1,58,17 +CMQTTRXTOPIC: 1,58 messages/173a5e39-7c5b-400e-8d53-a0a0292d5e9d/control_pump +CMQTTRXPAYLOAD: 1,17 { “status”:true } +CMQTTRXEND: 1 Pump is on I (62794) AT_CMD: REC: +CMQTTRXSTART: 1,58,17 +CMQTTRXTOPIC: 1,58 messages/173a5e39-7c5b-400e-8d53-a0a0292d5e9d/control_pump +CMQTTRXPAYLOAD: 1,17 { “status”:true } +CMQTTRXEND: 1 Pump is on I (63494) AT_CMD: Send: messages/109626a5-086b-4e4b-b51e-57c6370adbf1/humidity I (63604) AT_CMD: REC: OK 57c6370adbf1/humidity I (63604) AT_CMD: Send: AT+CMQTTPAYLOAD=1,42 I (63714) AT_CMD: REC: AT+CMQTTPAYLOAD=1,42 > I (63714) AT_CMD: Send: {“batt”:90,”curr_hum”:66.00000,”cn”:”LTE”} I (63824) AT_CMD: REC: OK I (63824) AT_CMD: Send: AT+CMQTTPUB=1,0,60,0 I (64004) AT_CMD: REC: AT+CMQTTPUB=1,0,60,0 OK +CMQTTPUB: 1,0 +CMQTTCONNLOST: 1,1 I (64014) AT_CMD: Send: AT+CMQTTTOPIC=1,54 I (64124) AT_CMD: REC: AT+CMQTTTOPIC=1,54 +CMQTTTOPIC: 0,11 ERROR I (64194) AT_CMD: Send: AT+CMQTTTOPIC=1,54 I (64294) AT_CMD: REC: AT+CMQTTTOPIC=1,54 +CMQTTTOPIC: 0,11 ERROR I (65194) AT_CMD: Send: AT+CMQTTTOPIC=1,54 I (65304) AT_CMD: REC: AT+CMQTTTOPIC=1,54 +CMQTTTOPIC: 0,11 ERROR I (66294) AT_CMD: Send: AT+CMQTTTOPIC=1,54 I (66404) AT_CMD: REC: AT+CMQTTTOPIC=1,54 +CMQTTTOPIC: 0,11 ERROR

Em đang gửi lệnh AT qua UART2 để thực hiện kết nối module sim đến MQTT broker nhưng module sim trả về ERROR. Anh xem giúp em đoạn code sau có lỗi không ạ:

typedef enum
{
AT_OK,
AT_ERROR,
AT_TIMEOUT,
}AT_flag;

bool _mqttStart(int retry)
{
AT_flag res;
while(retry–)
{
send_ATComand(“AT+CMQTTSTART”);
res =_readFeedback(10000, “+CMQTTSTART: 0”);
if(res == AT_OK) return true;
else if(res == AT_ERROR) return false;
}
return false;
}

Em cảm ơn ạ. Anh ơi, có phần mềm nào để test các câu lệnh AT của module sim không ạ? Em dùng hercules thì phải thao tác thủ công nhiều ạ.