HCI_UART on THINGY:91

[Hoang]

Dear, 

I am trying to test BLE on the THINGY:91. 

Follow the Q&A for "Introduction to Nordic THINGY:91" webinar, Q12  of @Petter Myhre

I tried with Zephyr HCI UART example 

But, I couldn't find nrf52840_pca20035.overlay. From the schematic of THINGY:91, I created file: nrf52840_pca20035.overlay

/* SPDX-License-Identifier: Apache-2.0 */

/ {
	chosen {
		zephyr,bt-uart=&uart1;
	};
};

&uart1 {
	current-speed = <1000000>;
	status = "okay";
	tx-pin = <25>;
	rx-pin = <32>;
	rts-pin = <22>;
	cts-pin = <19>;
};

Then, 

use nRF91 DK to program for THINGY:91 (SW SELECT to nRF52) 

After programming, I couldn't find any serial port to connect to THINGY:91 anymore!!!

I tried to restart my computer and reset thingy:91, but the same problem. 

Did I do something wrong? How can I fix it?

Thanks so much 

Best Regards, 

Hoang Nguyen

[Hoang]

And, on the schematic of THINGY:91: MCU_IF: 

and, I check dts files:

nrf91: ncs_v1.0.0_joakim\nrf\boards\arm\nrf9160_pca20035\nrf9160_pca20035_common.dts#L165

&uart0 {
	current-speed = <115200>;
	status = "okay";
	tx-pin = <18>;
	rx-pin = <19>;
	rts-pin = <20>;
	cts-pin = <21>;
};

&uart1 {
	current-speed = <1000000>;
	status = "okay";
	tx-pin = <22>;
	rx-pin = <23>;
	rts-pin = <24>;
	cts-pin = <25>;
};

/* UART2 must be enabled for defines to be available for SPM. */
&uart2 {
	status = "okay";
};

nrf52840:  ncs_v1.0.0_joakim\nrf\boards\arm\nrf52840_pca20035\nrf52840_pca20035.dts#L39

&uart0 {
	compatible = "nordic,nrf-uarte";
	current-speed = <115200>;
	status = "okay";
	tx-pin = <15>;
	rx-pin = <11>;
	rts-pin = <21>;
	cts-pin = <20>;
};

&uart1 {
	current-speed = <1000000>;
	status = "okay";
	tx-pin = <25>;
	rx-pin = <32>;
	rts-pin = <22>;
	cts-pin = <19>;
};

UART0_nRF91 and UART0_nRF52 are matching ,

but 

UART1_nRF91 and UART1_nRF52: 

rx-pin = <32>;  but on the schematic nRF52_P1.00 

Is it correct ? I am confusing here.

Thanks, 

BR, 

Hoang Nguyen 

[Martin Lesund]

Hi Hoang,

From the nrf52840 pin config, you can see that p0.00 --> p0.31 and p1.00-->p1.15.
That means the following:

p0.30 ==> <30>

p0.31 ==> <31>

p1.00 ==> <32>

p1.01 ==> <33>

---

Here is the default boardcontroller on the Thingy91:
 thingy91_nrf52_usb_v0.2.2.hex

[Hoang]

Thank Martin Lesund, 

 about the pin p1.00 ==> <32>, I got it,

and: 

Hoang said:

After programming, I couldn't find any serial port to connect to THINGY:91 anymore!!!

I could program, and it works normal, but I couldn't find the serial port to see the log file anymore. 

Do you have any suggestion to fix this problem? 

Thanks, 

BR, 

Hoang Nguyen

[Mattchew]

Hello,

Also trying to get the lte gateway working on the Thingy:91.

[Didrik Rokhaug]

Hi.

The nRF52840 on the Thingy:91 acts as a bridge between the UART and USB. However, that functionality is not present in the hci_uart sample. You can find the original firmware precompiled here: 

https://www.nordicsemi.com/Software-and-Tools/Prototyping-platforms/Nordic-Thingy-91/Download#infotabs

And you can find the source code on the master branch here:

https://github.com/NordicPlayground/fw-nrfconnect-nrf/tree/master/samples/usb/usb_uart_bridge

Best regards,

Didrik