Pre-setup

1. SIM insertion and antenna connection

2. After connecting the PC and EVB via USB, the POWER (①) LED will turn ON and the POWER (②) LED will turn ON.

3. Press the PWEKEY (④) to power up the device and turn on the STATUS (③) LED.

* Check the network connection status by checking that the NET_STA (⑤) LED is on.

SIM recognition/antenna behavior check

AT+CIMI? //SIM IMSI表示 440************ OK AT+CPIN?  +CPIN: READY //SIM認識OK OK AT+CSQ //アンテナの接続＆電波強度確認, "99,99"はエラー +csq: **,99 OK

[AT command supplement]

AT+CSQ (ideally a value between 10 and 31)

0: 113 dBm or higher
1: 111 dBm
2~30: -109 ~ -53 dBm
31: -51 dBm or less

AT+CPIN?

+CPIN: READY //SIM recognition OK

OK

+CME ERROR:xx //SIM not inserted or SIM connection failed

[Terminology Supplement]

IMSI: A unique number for each SIM card

Connect to base station/Check network connectivity

AT+CEREG? //EPSネットワーク登録状況確認 AT+CFUN=0  //最小限機能のみ(通信OFF) AT+QICSGP=1,1,"APN","unsername","password",3 // APN/ユーザー名/パスワード 設定 OK AT+CFUN=1  //セルラー通信機能すべてON AT+CGATT?  //応答が1→ネットワークアタッチ済 AT+COPS=?  //周辺の接続可能な基地局検索 AT+COPS=1,2,"PLMN番号" //基地局の指定 (期待する回線接続済みの場合不要) AT+COPS?  //現在接続中の基地局確認 AT+QCFG="band",0,0,14  //接続LTEバンド設定 {ex.14 = B3(=4)+B5(=10)} AT+QCFG="lte/bandprior",03　//LTEバンド {ex.B3(=03)} 接続を優先　 AT+QPING=1,"xxx.xxx.xxx.x"  //指定のIPアドレスへ、Ping疎通確認

[AT command supplement]

AT+CEREG?

+CEREG: 0,1 //Registration successful

+CEREG: 0,2 // Not registered, searching for operator

+CEREG: 0,3 //Registration refusal

+CEREG: 0,4 //Unknown error

+CEREG: 0,5 //Registered,Roaming

AT+CFUN?

0 // Only the minimum functionality is maintained

1//All functions ON

4// Only RF transmission/reception function is OFF (Airplane mode)

[Terminology Supplement]

APN: Access Point Name

PLMN: Abbreviation for Public Land Mobile Network, a five-digit number.

The first three digits are the country code, MCC (Mobile Country Code).

The last two digits are the MNC (Mobile Network Code)