Wiki source code of Debug NB-IoT Connection
Last modified by Xiaoling on 2024/08/19 16:09
Show last authors
| author | version | line-number | content |
|---|---|---|---|
| 1 | (% class="wikigeneratedid" %) | ||
| 2 | **Table of Contents:** | ||
| 3 | |||
| 4 | {{toc/}} | ||
| 5 | |||
| 6 | |||
| 7 | |||
| 8 | |||
| 9 | |||
| 10 | = **For BC95-G** = | ||
| 11 | |||
| 12 | ---- | ||
| 13 | |||
| 14 | |||
| 15 | == (% style="color:blue" %)**1. Check the reason why you can't access the network**(%%) == | ||
| 16 | |||
| 17 | (% style="color:#037691" %)**1) AT+CEREG=5** | ||
| 18 | |||
| 19 | (% style="color:#037691" %)**2) AT+CEREG?** (%%) ~/~/ This process may be longer, please repeat the input | ||
| 20 | |||
| 21 | (% style="color:#037691" %)**3) Mainly check the two parameters **(% style="color:red" %)**cause_type and reject_case** | ||
| 22 | |||
| 23 | |||
| 24 | [[image:image-20220530093747-3.png]] | ||
| 25 | |||
| 26 | |||
| 27 | == (% style="color:blue" %)**2. Network access operation:**(%%) == | ||
| 28 | |||
| 29 | (% style="color:#037691" %)**1) AT+CFUN=0** | ||
| 30 | |||
| 31 | (% style="color:#037691" %)**2) AT+NBAND=X** (%%) ~/~/ X means the local frequency band number | ||
| 32 | |||
| 33 | (% style="color:#037691" %)**3) AT+NRB** | ||
| 34 | |||
| 35 | (% style="color:#037691" %)**4) After waiting for a period of time, you can use **(% style="color:red" %)**AT+CSQ **(%%)**to query the network access** | ||
| 36 | |||
| 37 | |||
| 38 | [[image:image-20220530093821-4.png]] | ||
| 39 | |||
| 40 | |||
| 41 | (% style="color:blue" %)**Remarks:** | ||
| 42 | |||
| 43 | ~1. The operating voltage of the SIM card used must be less than 3.0V. | ||
| 44 | |||
| 45 | 2. The network access time varies with the signal strength. | ||
| 46 | |||
| 47 | 3. If you have not been able to access the network, please try to access the network manually. | ||
| 48 | |||
| 49 | |||
| 50 | == (% style="color:blue" %)**3. Check the PS Attach or Detach **(%%) == | ||
| 51 | |||
| 52 | (% style="color:#037691" %)**1) AT+CGATT?** | ||
| 53 | |||
| 54 | (% style="color:#037691" %)**Response | ||
| 55 | +CGATT: <state> | ||
| 56 | OK** | ||
| 57 | |||
| 58 | (% style="color:#037691" %)**Write Command | ||
| 59 | AT+CGATT=<state>** | ||
| 60 | |||
| 61 | (% style="color:#037691" %)**<state> Integer type. Indicates the state of PS attachment. | ||
| 62 | 0 Detached | ||
| 63 | 1 Attached**(%%) | ||
| 64 | |||
| 65 | |||
| 66 | **Note:Generally, when registering with an operator, attaching GPRS is automatic, and CGATT can manually attach the network.** | ||
| 67 | |||
| 68 | |||
| 69 | == (% style="color:blue" %)**4. Check the signaling connection status:**(%%) == | ||
| 70 | |||
| 71 | (% style="color:#037691" %)**1) AT+CSCON?** | ||
| 72 | |||
| 73 | (% style="color:#037691" %)**Response | ||
| 74 | +CSCON: <n>,<mode> | ||
| 75 | OK** | ||
| 76 | |||
| 77 | (% style="color:#037691" %)**<n> Enable/disable the URC. | ||
| 78 | 0 Disable the URC | ||
| 79 | 1 Enable URC +CSCON: <mode> | ||
| 80 | <mode>Signaling connection status. | ||
| 81 | 0 Idle | ||
| 82 | 1 Connected** | ||
| 83 | |||
| 84 | |||
| 85 | == (% style="color:blue" %)**5. Check the PDP Context Activate/Deactivate**(%%) == | ||
| 86 | |||
| 87 | (% style="color:#037691" %)**1) AT+CGACT?** | ||
| 88 | |||
| 89 | (% style="color:#037691" %)**Response | ||
| 90 | [+CGACT: <cid>,<state>]** | ||
| 91 | |||
| 92 | (% style="color:#037691" %)**[+CGACT: <cid>,<state>] | ||
| 93 | […] | ||
| 94 | OK** | ||
| 95 | |||
| 96 | (% style="color:#037691" %)**<state> Integer type. The state of PDP context activation. | ||
| 97 | 0 Deactivated | ||
| 98 | 1 Activated | ||
| 99 | <cid> Integer type. A numeric parameter which specifies a particular PDP context definition (see | ||
| 100 | AT+CGDCONT).**(%%) | ||
| 101 | |||
| 102 | |||
| 103 | (% style="color:red" %)**Note: Note that having a cell ID attached to the network does not necessarily mean successful activation. For data exchange, such as initiating HTTP requests, activation is necessary to use them.** |