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I built micropidash. real-time web dashboard in under 20 lines of MicroPython. No cloud, no framework.

Kritish — Tue, 04 Aug 2026 17:52:48 GMT

Been building IoT projects every day for my #100DaysOfIoT challenge and kept running into the same problem — monitoring sensor data from ESP32/Pico 2W in a browser was always a mess.

So I built micropidash. real-time web dashboard in under 20 lines of MicroPython. No cloud, no framework.

Just shipped v2.0.0 with live sensor graphs — tested with DHT11 on Pico 2W, temp + humidity updating in the browser over WiFi.

pip install micropidash

github.com/kritishmohapatra/micropidash

Would love feedback if you try it!

RE: Power Connection problem

GeoForeman — Thu, 23 Jul 2026 03:05:44 GMT

Hi Everyone, I have a project that needs to connect rp2040, rapsberry pi pico 0 to modules : HW‑357, 3.7v 4000mA battery, usb for charging, now for other sensors

Ky-008 ,HC-SR501 , NEO-M8, 3V-5V DC vibration motors ,microSD card breakout board / microSD card Adapter, please include the breadboard..

RE: RE: Power Connection problem

michaelkellett — Fri, 24 Jul 2026 12:29:58 GMT

The FP6277 is a boost converter - not a battery charger.

You don't need a booster to charge a Lithium Ion battery from USB - just a charger control chip.

https://www.adafruit.com/product/259

https://www.amazon.co.uk/Lithium-Battery-Charging-Protection-Functions/dp/B08DQXPNR1/ref=asc_df_B08DQXPNR1

You could then connect the Pico directly to the battery.

https://randomnerdtutorials.com/power-raspberry-pi-pico-6-different-ways/#batteries

I haven't tried or tested any of the above.

I suggest that you do a good bit more web research before spending money.

RE: RE: Power Connection problem

GeoForeman — Fri, 24 Jul 2026 11:27:32 GMT

Hi, Sorry for being a noob. I want to start with the charging unit, I am using FP6277 as charger / booster, I want to connect the 3.7v 4000mA battery to the FP6277 and raspberry pi pico 0 : RP2040, in such a way that it it can charge the battery while connected to usb port and run and boost the voltage as necessary even without connected to USB. It would be helpful if you can send me a schematics so that I would have an idea. I need to see the connection how it is connected also to pico ports. Thanks.

RE: RE: Power Connection problem

GeoForeman — Fri, 24 Jul 2026 11:19:13 GMT

Thanks I will draw it.

RE: RE: Power Connection problem

dang74 — Fri, 24 Jul 2026 09:59:56 GMT

Thanks dougw

RE: RE: Power Connection problem

dang74 — Fri, 24 Jul 2026 09:58:38 GMT

Thanks michaelkellett this is what I want to achieve.

RE: RE: Power Connection problem

michaelkellett — Fri, 24 Jul 2026 08:45:28 GMT

If you must have 3.3V you will have a hard choice. To get the most out of a nominal 3.7V Lithium Ion battery you would like to run it down to 3V or even 2.7V.

Fully charged it will deliver 4V.

For low power stuff you could use an LTC3532 regulator which will do the business:

I think this is a quite common approach - and there will be other (and cheaper) chips than the LTC3532 but I've used it and know it works. It is also supported by a good model in LTSpice.

The max input voltage for the chip is only 5.5V so don't forget to have some kind of transient clamp on the input.

RE: RE: Power Connection problem

dougw — Fri, 24 Jul 2026 07:02:49 GMT

Systems that require multiple supply voltages are very common and it is much simpler now to use efficient switching converters to meet these requirements than it used to be. It is very common to generate high voltages with step-up converters.

RE: RE: Power Connection problem

dang74 — Thu, 23 Jul 2026 15:00:22 GMT

In the future I was considering starting a project that will use a chargeable battery. I was thinking of having a SEPIC converter between the battery and my downstream 3.3V devices. The thought process being that it could handle the higher than expected voltages like the 4.2V that you cite and also keep ticking as the battery voltage gets depleted. Do you know if this is a common approach?

RE: RE: Power Connection problem

dougw — Thu, 23 Jul 2026 13:54:10 GMT

The battery could have a max voltage higher than its nominal 3.7V , maybe as high as 4.2 V. Pico has a regulator that outputs 3.3V and expects interface signals to be 3.3V compatible. Do you have a specific question about the peripherals you mentioned? Are you looking for a schematic?

RE: RE: Power Connection problem

robogary — Thu, 23 Jul 2026 13:17:17 GMT

Recommend you first draw or sketch a schematic and check each component for 3.7v capability. You may need to include 5v circuits as well as 3v circuits.

I usually build my own breadboard using convenient connectors for power distribution , usually pcb to screw terminals. Ill include screw terminals for an external fuse and on/off switch.

RE: IOT CONNECTION ISSUE

SamanthaCh — Wed, 27 May 2026 13:05:37 GMT

Thank you very much, it was a wiring connection issue.

IOT CONNECTION ISSUE

SamanthaCh — Tue, 26 May 2026 02:07:27 GMT

Hii, may I ask if there might be any connection error between my ESP32 and MAX30102? I used male-to-male jumper wires to connect them, but it seems like the ESP32 still cannot detect the MAX30102 sensor. Does anyone know what could be the issue? Thank you.

RE: IOT CONNECTION ISSUE

SamanthaCh — Wed, 27 May 2026 13:04:31 GMT

Thanks very much, I solved it. It was a wiring issue.

RE: IOT CONNECTION ISSUE

obones — Tue, 26 May 2026 09:40:04 GMT

Without the code you are running on the ESP32, it's hard to tell.
I mean, it could either be a faulty connection, or a faulty setup code inside the ESP32

RE: IOT CONNECTION ISSUE

shabaz — Tue, 26 May 2026 03:31:39 GMT

Your connections locations look fine to me, perhaps it is a software issue. There's also a chance it could be a breadboard or jumper wire quality issue.

Ideally you'd use an oscilloscope to check that you can see I2C data is occurring or not. A logic analyser could be used, but better to start with an oscilloscope and examine the supply, SDA and SCL lines.

Without an oscilloscope, I think the best you can do is swap out the jumper cables in case they are faulty, and maybe try a new breadboard unless you know you can trust it (some of the very cheap ones have poor non-nickel-plated contacts for instance), and double-check the code to try to get confdence that I2C is functioning.

Converting The SENSECAP to standard Lora Wan Gateway

meera_hussien — Wed, 01 Apr 2026 02:47:29 GMT

I have a SenseCAP gateway that I used previously for Helium, but I am not using it anymore. I am planning to convert it into a standard LoRaWAN gateway. I searched online and found that it seems possible. Just wanted to ask if any members here have tried this before, and was it successful?

The link for this product is below

https://www.sensecapmx.com/docs/sensecap-m1/overview/

Industrial Internet of Things (IIoT) solutions

athang — Wed, 18 Feb 2026 08:41:31 GMT

I am here looking for IIoT solution for organization. I also searched this on many different website and found many solutions. We are bit confused to which one to choose. One of my friend suggest me this platform, and i am hoping i will get the solution from here. So can anyone please suggest the good solution platform?

RE: Industrial Internet of Things (IIoT) solutions

BigG — Mon, 23 Feb 2026 15:59:00 GMT

I too struggle with acronym's. It's a bit like suncream... You need to apply liberally when out there in the field... or at trade shows. Otherwise you get burnt.

For me, "Industrial" implies environmental conditions. So temperature rating is a big thing (to -40C to 105C etc). Other aspects that apply are voltages (typically can accept 24V) and then immunity to noise etc.

Arduino Opta is a great case study of how you take a consumer led IoT product to switch it over to industrial: https://www.arduino.cc/pro/hardware-arduino-opta/

RE: Industrial Internet of Things (IIoT) solutions

colporteur — Mon, 23 Feb 2026 04:04:00 GMT

You got all that out of I am here looking for IIoT solution for organization.". Wow!

RE: Industrial Internet of Things (IIoT) solutions

shabaz — Sun, 22 Feb 2026 23:16:48 GMT

Hi Sean,

I suspect IIoT is an informal acronym than the full phrase Industrial IoT. The trade shows mentioned are industry/business focused so would have been ideal for the OP as a first step, if they are serious about moving forward.

The industrial part trickles down to requirements such as not having access to the devices for upgrades (I.e. remote upgrades become more important than USB update for a consumer item), needing to have security usually (and proving it), ability to not need to manually configure every single device (because the particular industry/enterprise may be purchasing hundreds, versus a consumer who doesn't mind a slower onboarding per device), maybe far more expensive cloud data storage (might need to mine data later, or might need to process more in near-real-time), more power options perhaps, or run for the life of the product without needing to change batteries, and a bit more ruggedness perhaps, run in colder/hotter temperatures etc. There are all manner of sensors and actuators etc., but it's not a solution, just a bunch of components or at best systems, until the work is done to understand the specific business and technical requirements, and design a solution that provides whatever processing, storage, presentation, control, reports etc that are needed to meet those requirements (i.e. to me it's illogical to ask the original question 'which IoT solution to choose', because no IoT solution already exists for the OP; they have to do the hard work (or hire someone) to design that, and then implement that.

RE: Industrial Internet of Things (IIoT) solutions

colporteur — Sun, 22 Feb 2026 20:57:12 GMT

While IoT refers to consumer technology, IIoT specifically targets industrial applications. I didn't know that.

You didn't inquire about the industry and the question didn't provide that detail. It involves interconnected devices, such as sensors, actuators, and advanced analytics platforms. Predictive maintenance, which prevents equipment failure, as well as supply chain optimization and increased operational efficiency are some applications.

Does IIot match an industry or is it just a collection of data generating sensors and their collectors?

RE: Industrial Internet of Things (IIoT) solutions

shabaz — Wed, 18 Feb 2026 16:43:01 GMT

Hi,

(Long answer): Technically what you'll find are often components or bits of systems or SaaS, it's not a solution. The solution cannot exist until you (or someone on your behalf) has designed it, and then developed and deployed it, ideally to meet (amongst other things) your business needs.

If initial needs are very basic (e.g. for a simple initial trial) then you could ask any IoT device manufacturer (for say one of the types of things you wish to monitor or control) to set you up a simple demo, using whatever platform they use (might be their own, or one they are familiar with).

Or, even more basic, you could have a play with any IoT platform, most have demonstration software or products, e.g. Azure, AWS, even Arduino I think. It doesn't matter too much since the solution has not been designed at this point, and you're rather using the trial as part of your research to decide what you want in your actual solution.

If you really want to move forward and design and implement a solution, then you could hire someone to help you with this, but often you will also need at least a few people in your firm (particularly developers) to dedicate time to the project too. If you really do want to hire someone for a period of time to design the solution for you, if you place the job requirement on your work website or normal site you use for recruitment, or maybe provide the link to it or detail here, I am sure someone may reply (I might depending on the circumstances).

However, if you're not at that stage yet, or wish to see what others have done, and if you're completely new to this, it's best to visit a trade show (e.g. there was a free-to-visit large IoT show in London just a week or two ago - and there's a less focused, more generic but larger show in London Excel in two weeks time from now) where you will find hundreds of firms showing their components or SaaS and so on. They will all be able to tell you how their offerings were used in solutions, and it's easier then to see which ones align with your needs, and they may even point you to individuals and firms that they worked with to help build those solutions for the end customer. I'd strongly recommend it, because it's a very quick way to start seeing some of the possibilities, and roughly gauging what you will want or need. I don't know your location, but if you keep an eye out I am sure there will be similar shows at least in your region (and sometimes it is worth visiting trade shows for similar-ish industries too, to see what others may be doing if they have similar requirements.

RE: Has anyone built a truly low-power camera IoT device on an off-the-shelf SoM?

lichurbagan — Sat, 27 Dec 2025 15:47:12 GMT

What camera did you use? Was it the ESP32-CAM or something else?