HCI_UART on THINGY:91

Question

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

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

Fullscreen

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/* 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>;
};
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

/* 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