SIM7000E issues with +CNACT command whe trying to invoke HTTPS request

[milanbx]

Hi,
there are 3 topics I would like to address here:

1. Firmware SOLVED!
2. AT+CNACT command
3. HTTPS attempt and AT+SHCONF="BODYLEN",1024 command SOLVED!

ad. 1: Firmware
my SIM7000E shield reports firmware version 1529B01SIM7000E. So, first of all, is this the lastest verions? Where I can check and download fimrware for this module? Is there a documentation how to upgrade firmware?

ad. 2: AT+CNACT command
I have succesfully connected the module in GPRS mode using AT+SAPBR command and invoked HTTP requests. However, if I try to do so using AT+CNACT (using PDP context), the AT+HTTPACTION fails with error 601. But IP address is obtained properly.

ad. 3: HTTPS attempt and AT+SHCONF="BODYLEN",1024 command
i have also tried HTTPS request using many different step-by-step guides from all over the internet, e.g. https://gist.github.com/baconcheese113/1f0264727fce3fa51a5bb06fa031aed2. All of them failed at this command. But if I changed the size to 64, it was OK. Why is that?

Thanks for help.

[milanbx]

Well, firmware found at https://github.com/botletics/SIM7000-LTE-Shield/tree/master/SIM7000%20Documentation, co my number 1. is solved so far.
I will try to upgrade the firmware and try again all the steps.

[milanbx]

Is it ok to download firmware version B09 form this site?
https://techship.com/downloads/simcom-sim7000e-firmware-1351b09sim7000e

[milanbx]

I have upgraded the SIM7000E firmware to revision 1351B08SIM7000E successfully!
The AT+SHCONF="BODYLEN",1024 command solved!

However, AT+CNACT=1,"internet.t-mobile.cz" still answers:

OK
+APP PDP: DEACTIVE

I’ve also read all the notes on HTTP, HTTPS, even TCP/IP, PING, and MQTT. None of them helped.
The HTTP(S) note explains in sections 4.1 and 4.2 how to establish a proper data connection to the network before issuing any HTTP(S) requests. Regardless of whether I used automatic APN configuration with AT+CGDCONT=1,"IP","" or set it manually with AT+CGDCONT=1,"IP","internet.t-mobile.cz", running AT+CNACT=1 to activate the +APP PDP never returned ACTIVE.