Change the upload speed to 115200 baud. We already have installed the board Wemos D1 mini correctly in Arduino IDE. Before proceeding to the next step, let's talk a little about Blynk: Blynk is a platform for ios and Android that allows you to control programmable boards on arduino and Raspberri Pi through internet. I want to connect a D1 Mini do PL9823LEDs (similar to the strips). But as they behave strange I think I have to shift the logic level for the Data In from 3.3V from the Wemos to 5V for the LEDs. pert April 13, 2019, 1:43pm For D1 Mini, click Pick specific board and select Wemos D1 and Wemos D1 mini. Click Next. Once done, click Skip. Find the light-dimmer device and click EDIT. Insert your Wi-Fi SSID and password: wifi: ssid: "MyWiFiName" password: "MyWIFiPassword" Just below the captive_portal:, paste the following code: output: - platform: ac_dimmer id Wemos D1 is now d1_mini rather than wemos_d1. nodemcuv2 is there and is how my boards were described on Amazon by AZ Delivery. So while on the PC I setup a new device with the default yaml and changed the board to the nodemcuv2. I didn’t get far using the second option for install (it failed). The ESP-01 and the Wemos D1 R1 are not quite the same… based on the same chip, but not the same device. The Wemos D1 R1 is meant as a standalone programmable device. And while the ESP-01 can be used that way, albeit limitedly, by default it comes as a WiFi transceiver for use with AT commands that can allow it to act as a Serial to WiFi I am creating a project using Wemos D1 Mini to control a two-relay module. If I supply power to Wemos using USB and relays using a buck converter (all 5v) then everything seems to be working. However, if I power everything from just the buch converter, nothing works. Control an Arduino Project Through a Customisable Android / Iphone App With Blynk and Wemos D1: THE 2016 SUPER NOOB FRIENDLY WAY. by Ruben Marc Speybrouck in Arduino. WeMos D1 and D1 Mini Arduino Projects: Make S2 boards into Device Firmware Upgrade (DFU) mode. Hold on Button 0. Press Button Reset. Release Button 0 When you hear the prompt tone on usb reconnection. Flash using esptool.py. esptool.py --port PORT_NAME erase_flash esptool.py --port PORT_NAME --baud 1000000 write_flash -z 0x1000 FIRMWARE.bin. 1n7w3.