Interfacing NRF52832DK with Quectel EC20

RE: Interfacing NRF52832DK with Quectel EC20

awneil — Wed, 24 Mar 2021 14:40:04 GMT

[quote userid="98094" url="~/f/nordic-q-a/73128/interfacing-nrf52832dk-with-quectel-ec20/301664#301664"]I found that while communicating with other peripherals we have to send data byte by byte[/quote]

What do you mean by that?

[quote userid="98094" url="~/f/nordic-q-a/73128/interfacing-nrf52832dk-with-quectel-ec20/301664#301664"] I'm completely new NRF[/quote]

Do you have any experience with any other microcontroller(s) ?

Do you have any experience with programming in general ?

RE: Interfacing NRF52832DK with Quectel EC20

Arun0498 — Wed, 24 Mar 2021 12:19:22 GMT

Yes I tried the UART example in the SDK and communicated with PC, then I found that while communicating with other peripherals we have to send data byte by byte so I used app_uart_put() it is also not working. As you said I tried to change the UART pins so I followed this thread still I don't understand fully can you elaborate a little more. I'm completely new NRF and this my first time using a protocol.

RE: Interfacing NRF52832DK with Quectel EC20

awneil — Tue, 23 Mar 2021 12:18:56 GMT

[quote userid="98094" url="~/f/nordic-q-a/73128/interfacing-nrf52832dk-with-quectel-ec20/301386#301386"]

Regarding Termite what I was trying to say was I'm able to see the AT Command what I'm sending through UART but it has no effect on the Quectel EVB

[/quote]

We still have no idea how you have your Termite connected.

Post a schematic.

Again:

[quote userid="6462" url="~/f/nordic-q-a/73128/interfacing-nrf52832dk-with-quectel-ec20/301373#301373"]Remember that the DK has a hardware connection from the Virtual COM Port (in the on-board J-Link) to the nRF52832 chip[/quote]

[quote userid="98094" url="~/f/nordic-q-a/73128/interfacing-nrf52832dk-with-quectel-ec20/301386#301386"]how can I define the GPIO pins as UART pins?[/quote]

It's in your UART initialisation.

It sounds like you need to spend some more time getting familiar with the nRF52832, DevKit, etc before adding external equipment.

Have you looked at the UART examples in the SDK ?

RE: Interfacing NRF52832DK with Quectel EC20

Arun0498 — Tue, 23 Mar 2021 10:52:20 GMT

Hi,

Quectel operates on 1.8V but the Evalution board already has a voltage level translator,

115200 is the Baudrate

Data bits 8

No Parity

Stop Bits 1

Regarding Termite what I was trying to say was I'm able to see the AT Command what I'm sending through UART but it has no effect on the Quectel EVB

Also how can I define the GPIO pins as UART pins?

RE: Interfacing NRF52832DK with Quectel EC20

awneil — Tue, 23 Mar 2021 10:15:54 GMT

You need to give a lot more detail.

How does "termite" fit into all this?

Remember that the Quectel EC20 (whatever that is) neither knows nor cares what microcontroller you use - all it sees is the signals on its UART inputs.

So how have you verified that you are supplying the correct signals?

Voltage levels?
Baud rate?
Number of data bits?
Parity?
Number of stop bits?

[quote userid="98094" url="~/f/nordic-q-a/73128/interfacing-nrf52832dk-with-quectel-ec20"]NRF52DK [/quote]

Remember that the DK has a hardware connection from the Virtual COM Port (in the on-board J-Link) to the nRF52832 chip - you will need to disconnect that (or use different pins for the UART) to connect the UART to any other device.

Details are in the DK User Guide