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The purpose of these headers was not immediately obvious to me at first. Just behind the headphone jack are another set of jumpers. If the jumper is present then then flight mode is controllable through software. The control flight-mode with the pi, bridge pins D4 and Flight with a jumper. In addition to controlling power, you now also have the option to place the device in flight mode. If the jumper is removed then the only way to control the devices power state is manually using the power button. A third option is to remove the jumper entirely. A user can also control the state through the power button on the side of the device. If the jumper is moved to bridge PWR and D6, then the SIMCOM 7600 will be off by default, but the Pi can control the power state itself. In this default state, the SIMCOM 7600 will turn on any time that it receives power. Starting with the yellow header, there is a jumper already bridging PWR and 3V3. Before powering it on, I went to the documentation to see what these were all for. The Simcom 7600 for the Pi has a couple of USB ports and jumpers on it. But I’ve got everything working (minus the cooling fan). To secure the board and my batter I had to use a different set of standoffs.
![install silverlight on raspberry pi install silverlight on raspberry pi](https://platform.uno/docs/articles/guides/raspberry-pi/images/05_install-uno-templates.png)
Personally, I feel that a Pi that is using a mobile connection should also have its own battery. Included in the box are a couple of standoffs and screws for securing the 7600 to the board. To do so, I had to remove the cooling fan that I had on my Pi. The most obvious way is to connect the 4G hat to the 40-pin connector. There are some options in how it is connected. The Simcom 7600 connects to a Pi the same way you would connect any other hat. A-H are primarily for North America, Australia, New Zealand, Taiwan, and Latin America. E-H work best in Southeast and West Asia, Europe, and Africa. Different variants are best supported by mobile networks in different regions. The letter lets you know which variant that you have. When you purchase a Simcom 7600, there is usually a letter following that number. The version that I use is also without an SD card slot. There are some slight differences in the labels on the headers between these models. The version that I am using was released in 2020 December.
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There are two primary versions of the device. Since both the Pi and the Jetson are Linux based ARM devices and the models are both using the same chipset my expectation is for the setup to be similar. After a few delivery delays I have one in my hands and am looking at it now. When I spoke of it I had mentioned that there is also a version of the cellular model that is specifically made for the Raspberry Pi. I recently setup the Simcom 7600 on a Jetson Nano.