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[nRF52] Put the most common case first (Adafruit bootloader) #5549

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[nRF52] Put the most common case first (Adafruit bootloader) #5549

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c81a19c
Put the most common case first (Adafruit bootloader)
lboue Nov 1, 2025
abca49b
Update flashing instructions for nRF52 boards
lboue Nov 1, 2025
b9e4d86
Update content/components/nrf52.md
lboue Nov 1, 2025
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28 changes: 14 additions & 14 deletions content/components/nrf52.md
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Expand Up @@ -29,22 +29,9 @@ The nRF52840 requires a bootloader, with two supported options: `MCUboot` and `A

Examples of low power [nRF52840 boards](https://github.com/joric/nrfmicro/wiki).

## Flashing with MCUboot

Flashing this bootloader requires an SWD connection, for which a programmer is necessary. A cheap ST-Link V2 can be utilized.

1. Connect the board to the PC via SWD.
1. Run `esphome upload yourfile.yaml --device PYOCD`.

```yaml
# Example configuration entry
nrf52:
board: adafruit_feather_nrf52840
```

## Flashing with Adafruit nRF52 Bootloader

For flashing via a flash drive.
For Adafruit, Promicro nRF52840, Seeed Studio XIAO BLE boards via a flash drive.

1. Connect the board to the PC via USB.
1. Quickly short the reset pin to ground twice.
Expand All @@ -62,6 +49,19 @@ nrf52:
board: adafruit_itsybitsy_nrf52840
```

## Flashing with MCUboot

Flashing this bootloader requires an SWD connection, for which a programmer is necessary. A cheap ST-Link V2 can be utilized.

1. Connect the board to the PC via SWD.
1. Run `esphome upload yourfile.yaml --device PYOCD`.

```yaml
# Example configuration entry
nrf52:
board: adafruit_feather_nrf52840
```

## GPIO Pin Numbering

There are two ways to reference GPIO pins:
Expand Down