armBLR Posted November 23, 2018 Share Posted November 23, 2018 Hello, Has anyone tried to bring up a SIM7100E based hat on Orange PI Zero over the UART GPIO interface? I have enabled the UART ports in armbianEnv.txt as follows: overlay_prefix=sun8i-h3 overlays=usbhost2 usbhost3 uart1 uart2 dmesg | grep tty shows : [ 0.000379] console [tty1] enabled [ 1.765329] console [ttyS0] disabled [ 1.785581] 1c28000.serial: ttyS0 at MMIO 0x1c28000 (irq = 39, base_baud = 1500000) is a U6_16550A [ 1.785700] console [ttyS0] enabled [ 1.810679] 1c28400.serial: ttyS1 at MMIO 0x1c28400 (irq = 40, base_baud = 1500000) is a U6_16550A [ 1.835564] 1c28800.serial: ttyS2 at MMIO 0x1c28800 (irq = 41, base_baud = 1500000) is a U6_16550A I have connected the TX/RX pins as in the picture : http://linux-sunxi.org/File:OPi_Zero_UART.jpg to corresponding RX/TX ports on the SIM7100E module. The SIM7100E module I am using is : https://www.aliexpress.com/item/EU-Network-SIM7100E-4G-Module-Development-Board-Antenna-for-Arduino-Raspberry-Pi-Android-Linux-Windows/32864790020.html The module works fine on a standard linux Desktop running Ubuntu and am now trying to bring it up on Orange Pi Zero. Any help is much appreciated. Thank You. Link to comment Share on other sites More sharing options...
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