Beehive connected

That probably means you’re using the wrong HX711 library.


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I changed the directory, but, now I get this error: Error compiling for board Node32s.

Hello everyone,

Some news about my project:
Just to share my new version of my PCB with a GPS NEO6 and an accelerometer. The accelerometer will wake up my esp32 if my hive is moved. I need to check what is the sleeping current of the MPU6050 during my ESP32 sleeping time.



Salut Christophe, may I ask you which company you used for the PCB and could you share any details about it. I am working on another type of project and could learn from your experience.

Not sure who @christophebl uses, but I’ve been using JLCPCB and their design EasyEDA software and it’s very easy to use and the JLC service is great.
If you use EasyEDA then my advice would be not to start with a circuit diagram, instead do a PCB layout and give the same names to any nodes/tracks that need to connect together. So, for example, every object that connects to GND would be named GND. The software checks will then show any nodes with the same name that aren’t connected.


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Salut Didiercoyman,

You are french guy? I’m using JLCPCD and the design I used is Kicad. Of course I can share all details.
You can find some information here:

Let’s me know if you need more :).


Hi guys,
@christophebl I got a problem with your Code for the Beehive connected and the connection to Blynk.

Blynk.config(auth,blynk_server,blynk_port); // Initialise the Blynk connection settings
Arduino always says:
‘blynk_server’ was not declared in this scope

Can you help me with the Problem?

These two lines need to be un-commented (you need to remove the // characters at the beginning)…

//const char blynk_server [] = “”; // new variable to hold the name of the Blynk server //const int blynk_port = 8080; // new variable to hold the port used by the Blynk server


Thanks Pete that helped a lot.

The next Problem after the Connection Problem wit Blynk is:
I uploadet the Sketch to my ESP32 and take a look to the serial Monitor. There it was showing constantly:

Connecting to Wi-Fi
Guru Meditation Error: Core 0 panic’ed (IllegalInstruction). Exception was unhandled.
Memory dump at 0x400e2310: ffffffff ffffffff ffffffff
Core 0 register dump:
PC : 0x400e2314 PS : 0x00060830 A0 : 0x800df1eb A1 : 0x3ffb5440
A2 : 0x082f87eb A3 : 0xf205fd80 A4 : 0x0000750f A5 : 0x3ffc55dd
A6 : 0x3ffb5460 A7 : 0x3ffc55cc A8 : 0x800def7a A9 : 0x0000750f
A10 : 0x0001000f A11 : 0x00000000 A12 : 0x60005038 A13 : 0xffffffe8
A14 : 0xffffffe0 A15 : 0x3ffc226c SAR : 0x00000007 EXCCAUSE: 0x00000000
EXCVADDR: 0x00000000 LBEG : 0x4008443c LEND : 0x40084446 LCOUNT : 0x00000000

Backtrace: 0x400e2314:0x3ffb5440 0x400df1e8:0x3ffb54a0 0x400e01d6:0x3ffb54c0 0x400e05bc:0x3ffb54e0 0x400da3d3:0x3ffb55a0 0x400da652:0x3ffb55d0 0x400f1340:0x3ffb5600 0x400f1430:0x3ffb5630 0x400f172e:0x3ffb5660 0x400edb12:0x3ffb5690 0x400905db:0x3ffb56b0 0x40089ba5:0x3ffb56f0

and i don’t know what that means :sweat_smile:
i would appreciate your help

Do you have anything connected to your ESP32 other than the USB cable?


Yes all the Parts as in Post #10 are connected to the ESP32

Try disconnecting them and see if you get the same error.


Thanks Pete.
It worked with disconnecting all Parts.
It was a little contact between the wires what caused the Problem.:sweat_smile:

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#christophebl, please help me to make a hive scale like you did. The hives are far away from my house and i need to know the weight, temperature and humidity. These should be send to me via gsm with a card sim. I want to make the scale only for one hive, which make me a cloe about the situation.
I am novice in this domain, so I need the all information and the name of each pieces, like you showed in the scheme above.
Thank you!

I send you a message;)

Salut Christophe, I am also interested to connect my beehives through Lora (200m from my home). Are all libraries used identified? It is frequently a mess with Arduino sw.

Thank you for job done, I wish you a merry Christmas

Salut Alain,

you speak French? yes I have the list of used libraries. For Lora I’m using LMIC and it’s working perfectly.
If I can help you no problem for me :slight_smile:
I wish you also a merry Christmas

Bonjour Chrstophe,

Yes I am French, I live close to Lyon. I have 4 beehives, 15°C today. Bees are harvesting pollen 22nd of December !
I have an issue with HX711 library, like “Spanker” and “podesz”.
Could you please precize which is the correct library to use? And also, in which directory to place it? If it is necessary to?
Thank you for your support

G’day from Australia
Awesome project this and just what I want so I’m about to embark on it. I have a little Arduino knowledge and no ESP knowledge but Ill dive in the deep end and give it a go.
I plan to use almost exactly the same hardware as you @christophebl . Had started with an Arduino uno but will go for an ESP32 WROOM unless there is something better. Ill have 2 waterproof DS18B20 temp sensors, DHT22 for humidity, 50kg load cells with HX711, as well as a light sensor, decibel meter and maybe a angle sensor. Hell why not go full on.
The hive is about 5m from the house so will go for wifi and Blynk on my phone for monitoring and alerts and something on my computer for monitoring.
As a beginner ill probably struggle but keen to learn. Im a hardware guy and can put it all together but coding as all new and at the moment just cutting a pasting stuff so running into a few problems.
All the best and thanks in advance to all for your help.

I used an ESP32 because the deep sleep is better and longer time to set compare to an arduino.
If you need some help I can help you. I want also used the sound but it’s more complecate ;).