AT+CSSLCFG returns ERROR

[stbrie]

[Figured it out]

[Sort of. I still don't have HTTPS working right.]

I have not been able to get HTTPS to work. Here is what I've done so far:

1. Install the Windows 8 Drivers from the botletics repository .zip file (and what a nightmare. If you have trouble, make sure the micro-USB cable you are using can carry data. Apparently some micro-USB cables are power only, and I had a pile of them to go through.)
2. Install the qpst efs program.
3. Download an HTTPS websites security certificate using Microsoft Edge (Click on lock -> "Connection is Secure" -> Click on certificate icon -> Click on details tab -> click on copy to file -> next -> DER Encoded binary -> save file locally
4. in EFS, change to the alternate file system using phone -> preferences -> directories -> initial file system to display = alternate -> ok. (Why? Don't know. Don't know where this is documented in any of the application notes, either.)
5. file -> new -> select the file and copy it to the sim7000 filesystem in /customer (according to another GitHub issue, using ".crt" may have some effect on outcome... why? I don't know.)

Run the commands:

AT+CNACT=1,"hologram"
OK
AT+CNACT?
CNACT: 1,"10.99.xxx.xxx"
OK
AT+CMEE=2
OK
AT+CACID=0
OK
AT+CASSLCFG=0,"cacert","mysites_der.crt"
ERROR [likely caused by a backspace or something. Apparently backspacing in putty will cause ERROR for any AT command.]
AT+CASSLCFG=0,"cacert","mysites_root_CA_cert.crt"
OK
AT+CASSLCFG=0,"cacert","mysites_der.crt"
OK
// I have no idea why it didn't work the first time. Anybody?
AT+CSSLCFG="convert",2,"mysites_der.crt"
OK
AT+SHSSL=1,"mysites_der.crt"
OK
// !!!!
AT+SHCONF="URL","https://mysites.url.com"
OK
AT+SHCONF="BODYLEN",64
ERROR
// WTF?

AT+SHCONF="BODYLEN",64
ERROR
// WTF!!?

AT+SHCONF="bodylen",64
OK
// WTF?

AT+SHCONF="headerlen",64
OK

And everything works. I think the missing step was the AT+CASSLCFG commands.

[stbrie]

Still don't have HTTPS working with a site whose certificate is issued by ISG/letsencrypt, but the ERRORs I was seeing in the AT commands are from backspacing and editing the commands rather than the commands being typed out perfectly the first time. If I backspace in any command: ERROR. If I don't backspace and type the command correctly: OK. This appears to have been a problem between keyboard and chair. (PEBKAC).