Recording procedure using nrf52832 development kit with another module using MCU NRf52832.

RE: Recording procedure using nrf52832 development kit with another module using MCU NRf52832.

ssilva047 — Tue, 24 Jan 2023 11:56:04 GMT

okay, I'll assess this situation. He's having a private conversation with Jay Tyzzer. I already sent the Gerber file for him to evaluate.

RE: Recording procedure using nrf52832 development kit with another module using MCU NRf52832.

Bendik Heiskel — Tue, 24 Jan 2023 11:42:06 GMT

Hi,

After taking a closer look at your schematic I have found a problem. The antenna tuning capacitor have a value of 100nF, this is way too high. The tuning capacitance is usually in the pF range.This large capacitor will cause most of the TX signal to be reflected by the antenna back into the radio due to impedance mismatch.

Without measuring the antenna impedance I can't really recommend a suitable capacitance, but removing it should help with the antenna impedance. It won't be perfect, but you should be able to see it advertising.
We can tune the antenna and radio matching networks for you if you send us samples of the PCB. For more info on this please open a private ticket.

Best regards,

Bendik

RE: Recording procedure using nrf52832 development kit with another module using MCU NRf52832.

ssilva047 — Mon, 23 Jan 2023 20:23:41 GMT

In my case I had to make the following changes in menuconfig.
But I am using GPIO, UART.

CONFIG_GPIO=y
# STEP 2 - Enable the serial driver in asynchronous mode
CONFIG_SERIAL=y
CONFIG_UART_ASYNC_API=y

CONFIG_ENTROPY_GENERATOR=y
CONFIG_TEST_RANDOM_GENERATOR=n
CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DIS=y
CONFIG_BT_DIS_PNP=n
CONFIG_BT_BAS=y
CONFIG_BT_DEVICE_NAME="FTMS Service"
CONFIG_BT_DEVICE_APPEARANCE=1157

RE: Recording procedure using nrf52832 development kit with another module using MCU NRf52832.

ssilva047 — Mon, 23 Jan 2023 20:13:25 GMT

Good afternoon Bendik.

Apologies for the delay

That's right, I connect the VTG pin to the same VDD source on the custom board.

As shown in the picture of the custom plate.

But when I enable Bluetooth on the cell phone, I only find the MCU from the development kit.

RE: Recording procedure using nrf52832 development kit with another module using MCU NRf52832.

Bendik Heiskel — Fri, 20 Jan 2023 09:15:19 GMT

Hi,

Could you please open a separate ticket? If you make it a private one you can share the schematic of your PCB with us, too help with diagnosing the problem.

Best regards,

Bendik

RE: Recording procedure using nrf52832 development kit with another module using MCU NRf52832.

Kundan_19 — Thu, 19 Jan 2023 13:39:52 GMT

I'm attempting to flash into BL651 module(it has nrf52810 inside it) using an nrf52Dk with nrf connect to vscode. I am using a Mac system, and despite connecting the external nrf52810 board as shown in the above schematic, the code is not flashing on the board. I tried changing the external board but had no luck.Is their any setting to be changed in the menuconfig .Please assist me!

RE: Recording procedure using nrf52832 development kit with another module using MCU NRf52832.

Bendik Heiskel — Thu, 19 Jan 2023 13:00:23 GMT

Hi,

The programmer on the DK uses voltage on the VTG pin to detect when a external board is connected. If no voltage is present on this pin it will default to program the onboard nRF52832.

Are you connecting the VTG pin to the same VDD source as the custom board?

Is the custom board powered by the VDD from the DK? If not what is the supply voltage for the custom board?

Best regards,

Bendik

RE: Recording procedure using nrf52832 development kit with another module using MCU NRf52832.

ssilva047 — Wed, 18 Jan 2023 18:04:33 GMT

The code boils down to turning on LED 1 when connected and turning off LED1 when disconnected.