# ESP01s not working after flashing with ESP Easy \>\> Solution

**URL:** <https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544>\
**Category:** Hardware\
**Created:** [28 March 2019 12:28 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544 "2019-03-28T12:28:18Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![dynamicdave](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dynamicdave/32/96_2.png) [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Post date:** [28 March 2019 12:28 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544/1 "2019-03-28T12:28:18Z")

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This is a quick posting in case any one else gets tripped-up by the issue.

Although I have a number of Wemos D1 Mini devices working with Node-RED, this is the first time I've tried using the smaller ESP01s variety.

I recently flashed a set of ESP01s devices (with ESP Easy) and they all worked whilst they were in the USB Programmer, but when I mounted them on a breadboard - some of them wouldn't connect to my home WiFi. (i.e. the on-board small blue LED (that indicates WiFi connection) never came on.)

After a few hours pulling my hair out, I eventually tracked the problem down.

The ones that DO NOT have white silk screening on them need a pull-up resistor (10K ohms) from the CHPD pin (might be labelled as EN) to +3V3 (to enable the device otherwise it's disabled).

 ![ESP01s-front](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/2/229b029953191ac2f0897fcc1dd2b54ebd3e5611.jpeg)  
 ![ESP01s-rear](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/6/6c55cc92c87cc5f06f1c560820b976114823b6b2.jpeg)

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**Author:** ![cymplecy](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/cymplecy/32/2773_2.png) [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Post date:** [28 March 2019 12:53 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544/2 "2019-03-28T12:53:30Z")

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Ta for info  
Where did you get that nice looking programmer from?

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**Author:** ![dynamicdave](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dynamicdave/32/96_2.png) [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Post date:** [28 March 2019 13:15 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544/3 "2019-03-28T13:15:54Z")

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AliExpress - they were GBP 1.33 when I bought them.

> **[US $2.47 11% OFF|ESP8266 ESP 01/ESP 01S WIFI Module Adapter Download Debug...](https://www.aliexpress.com/item/ESP8266-ESP-01-ESP-01S-WIFI-Module-Adapter-Download-Debug-Link-Kit-for-Arduino-IDE-USB/32885857400.html?spm=a2g0s.9042311.0.0.27424c4dQcK9P7)**
>
> Smarter Shopping, Better Living! Aliexpress.com

You can probably get them from Banggood or Amazon.

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**Author:** ![TotallyInformation](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/totallyinformation/32/31_2.png) [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Post date:** [28 March 2019 13:24 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544/4 "2019-03-28T13:24:37Z")

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I have to say that I gave up on ESP8266 devices when I first tried them as getting the power supply requirements right was so flippin' hard.

Once I discovered the Wemos D1 Mini's though, problems over, not had any problems since (except with their temp/humidity sensor board which isn't worth the money at all. I have a 1/2 dozen or so in use now and not had one fail yet.

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**Author:** ![dynamicdave](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dynamicdave/32/96_2.png) [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Post date:** [29 March 2019 09:34 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544/5 "2019-03-29T09:34:46Z")

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Hi Julian,  
I found these Breadboard Power Adapters on AliExpress a couple of months ago for GBP0.30

![ESP-Power-Adapter-1](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/a/a4218dc22bc044af49c2d8546345ab738bceea69.jpeg)

Initially I wanted them to power a couple of Wemos D1 Minis where the micro-USB socket had come off the board, but later found them so useful to power other breadboard-based circuits.

Note:  
I did find some replacement USB-sockets at CPC-Farnell, but at GBP0.70 a go it didn't seem worth replacing the damaged socket (so I didn't bother)!!

I am amazed how many components are on the sub-module for the ultra-low price !!!

> **[US $0.36 |MB102 Breadboard Power Supply Module 3.3V 5V Solderless Breadboard...](https://www.aliexpress.com/item/MB102-Breadboard-Power-Supply-Module-3-3V-5V-Solderless-Breadboard-Voltage-Regulator-Diy-Kit/32834882693.html?spm=a2g0s.9042311.0.0.67794c4du3gab1)**
>
> Smarter Shopping, Better Living! Aliexpress.com

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**Author:** ![TotallyInformation](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/totallyinformation/32/31_2.png) [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Post date:** [29 March 2019 10:06 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544/6 "2019-03-29T10:06:21Z")

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Thanks Dave, they look better than the ones I was originally trying to use and I do have something similar to power hacks that don't use something like the D1-mini for power but to be honest, those are so cheap that I now use them for everything. Well except for the M5 Stack (ESP32) that I brought on a whim - that is a great piece of kit.

[https://www.aliexpress.com/wholesale?SearchText=m5stack](https://www.aliexpress.com/wholesale?SearchText=m5stack)

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**Author:** ![SteveMann](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/stevemann/32/3810_2.png) [@SteveMann](https://discourse.nodered.org/u/SteveMann)\
**Post date:** [30 March 2019 04:30 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544/7 "2019-03-30T04:30:19Z")

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> [@TotallyInformation](#):
>
> I have to say that I gave up on ESP8266 devices when I first tried them as getting the power supply requirements right was so flippin' hard.

I have several ESP8266-01's in various locations- some control relays, some have sensors. I just wire 3v3, RST and CH\_PD together. For power, I use these little AMS1117 modules:

 ![ams1117](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/2X/8/82e49ad2981632936053c9dd01c450ab4bc36174.jpeg)

These modules take anything from 4.5V to 12V on the input and output 3v3 which is exactly what the ESP8266-01's like.

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**Author:** ![Bobo](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bobo/32/8401_2.png) [@Bobo](https://discourse.nodered.org/u/Bobo)\
**Post date:** [30 March 2019 05:36 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544/8 "2019-03-30T05:36:07Z")

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ESPs are great, aside from one annoyance, the power consumption (of the wifi module). But if you correctly size a solar panel you can get away with using a single 18650 cell (along with some power management routines) to keep them running.

And best of all, NR keeps a close eye on them. Without NR, monitoring would be rather hit and miss.

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**Author:** ![cymplecy](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/cymplecy/32/2773_2.png) [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Post date:** [7 February 2023 08:00 UTC](https://discourse.nodered.org/t/esp01s-not-working-after-flashing-with-esp-easy-solution/9544/10 "2023-02-07T08:00:27Z")

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