Answer: This HAT does not have an audio codec, as a result, it lacks a voice calling feature. That is without the audio codec(audio circuit) the call will not send or receive any sound.
Answer: If there are no overlapping GPIO Pins, then you can stack the HATS and use it. About sensors, to can connect them to the empty GPIO pins.
Click to check the pinout of the Cellular HAT
Answer: The HAT is compatible with all Raspberry Pi which contains 40W GPIO header.
Answer: The Power pin controls the power of the BG96 module while the Disable pin controls the power regulator of the HAT.
Question: Are any additional components required to be added to get GPS to work or is all that included in the board?
Answer: You will need a Passive GPS Antenna. It also works with Active GPS Antenna but needs small soldering on the board.
Answer: Yes, Active GNSS/GPS antenna can be used with the HAT. In order to use it, you will need to solder the Active Antenna Enabling jumper (SJX) as follows
Answer: Yes, powering the Raspberry Pi is enough. It will power the attached HAT.
Answer: Serial can be enabled by following the instructions below:
- Run sudo raspi-config.
- Select Interfacing Options.
- Select Serial.
- Disable Login shell to be accessible over serial.
- Enable Serial port hardware.
- Finish and reboot your Raspberry Pi.
Answer: Yes, the HAT is certified on Verizon Network. While purchasing, please select the Hardware Version as North America - Verizon Certified.
Answer: PPP is a data layer communication protocol that is established through the serial port of the modem. These Serial port communication could be either the UART(/dev/ttyS0) or the serial exposed to USB(/dev/ttyUSB3). This serial is also used for both modem commands (AT commands) and responses. This connection is established by dial-up (ATD*99#).
PPP is easy to establish, widely used protocol, and flexible with the devices. PPP may show a drop of the connection while using the AT command set for other functionality of modem.
The LTE radio protocol has native support of TCP/IP and IPv6, so there is no need to actually wrap TCP/IP into PPP over the radio interface. The PPP protocol is just used between the computer and the modem to make the connection look like a legacy dial-up modem-based network connection.
To get rid of the legacy cruft, newer ways to present USB-connected LTE modems like QMI and MBIM have been developed.
Quectel modules offer QMI(Qualcomm MSM Interface) which is established as a real network interface, such as ethernet(typically shows as wwan0). The QMI is also counted among the non-AT protocols which are communicated over /dev/cdc-wdm0 port.
In order to establish a connection, proper qmi/gobinet proxy should be installed, which again depends on the chipset of the module/modem and the kernel of Linux, gets a bit complicated. The QMI offers a more accessible and faster connection compared to the PPP protocol.
We recommend QMI, if you are looking for a faster connection, and for a longer duration.
If you need to establish an internet connection for a short period of time and the date to be transferred is not high, you may stick to PPP.