4. Operation Procedures

4.1 Firmware Upgrade

Development of IoT Bit is an ongoing process and updates of the firmware will be announced on our website.

http://download.altitude.tech/Firmware_Updates/IoTBit

Before you start you will need to enable the UART peripheral.

This allows the IoT Bit to be updated via the Raspberry Pi.

4.1.1 Enable UART

It is recommended that at this point you backup the system.

Open terminal and enter:

$ sudo nano /boot/config.txt

Add the following line to /boot/config.txt

enable_uart=1

dtoverlay=pi-miniuart-bt

Save the file using CTRL-X then Y and ENTER.

Next open up the cmdline.txt file using

the following command.

$ sudo nano /boot/cmdline.txt

Modify the file so the contents from the line below replace the second line:

1. dwc_otg.lpm_enable=0

console=serial0,115200 console=tty1

root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait

2. dwc_otg.lpm_enable=0

elevator=deadline rootwait

Figure 15 - UART Enable Config File

Figure 16 - UART Enable Cmdline File BEFORE

Figure 17- UART Enable Cmdline File AFTER

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