Connecting arduino uno r4 with blynk

tuuhgf · February 13, 2024, 4:23am

I’m trying to connect my arduino uno r4 wifi with blynk. I’ve followed github instructions (GitHub - Blynk-Technologies/BlynkNcpExample_Arduino: Example IoT application using Blynk.NCP) and keep getting stuck on the last step (on my iphone it just get stuck on “waiting for device online”). When i tried the arduino_wifi_shiled on arduino ide examples with wifiS3.h, my serial monitor shows that its constanly connecting to wifi. The device still shows offline on blynk console.
20:18:41.323 → [20002] Connecting to Univeristy Towers
20:19:11.524 → [50148] Connecting to Univeristy Towers
20:19:41.712 → [80294] Connecting to Univeristy Towers
20:20:11.889 → [110440] Connecting to Univeristy Towers
I’m not sure if this is a hardware issue or something else since I’ve tried to use arduino iot and the connection was really bad (board will respond about every 5 seconds). Please let me know what to do. Thank you!!

PeteKnight · February 13, 2024, 1:44pm

When you say you’ve followed the instructions, does that include these instructions…

github.com

Blynk-Technologies/BlynkNcpExample_Arduino/blob/main/docs/Arduino_UNO_R4_WiFi.md

# Arduino UNO R4 WiFi

> __Note__: we're not responsible for any possible board damage, etc. Proceed at your own risk!

## 1. Switch the `UNO R4 WiFi` into ESP mode, upload `Blynk.NCP` firmware

1. Disconnect the UNO R4 WiFi from your PC
2. Short the pins highlighted in the image using a jumper wire:

![ESP32-S3 mode selection jumper](./Images/Uno-R4-Jumper.png)

3. Connect the UNO R4 WiFi to your PC
4. Upload ESP32 firmware:

```sh
pio run -e unoR4wifi -t upload_ncp
```

## 2. Upload the main MCU (Renesas) firmware

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Pete.