ESP32 & Lora — ELECROW - FORUM

i have CRT01265M. My fan is malfunctioning and it makes a very loud and sharp noise.

Jully — Wed, 15 Apr 2026 09:48:44 +0000

Answer:
It's very likely that the fan blades hit something. Check if they're loose and tighten them; that should fix it.

ThinkNode M5 antenna specifications

JohnGourlay — Mon, 06 Apr 2026 00:29:56 +0000

Can you tell us the gain and VSWR for the 915 MHz band of the antenna that comes with the ThinkNode M5?

Thinknode M3 flash memory

mbraner — Sun, 29 Mar 2026 20:57:53 +0000

New here. Hello! I am planning to port an embedded application to the M3. Question: does the M3 have an "external" (SPI) flash memory chip, or just the 1MB flash that is built into the nRF52840? Does any of that space appear as a "mass storage device" (a rather small mass) when plugged into a PC via USB? If not as it is, can that be arranged? Do the LoraWAN and Meshtastic models differ on this? If this is not possible, maybe I can use the "EEPROM" flash area - how large is it? Thanks.

ThinkNode M5 updating firmware

JohnGourlay — Mon, 30 Mar 2026 18:26:35 +0000

I'm trying to use flasher.meshtastic.org in Google Chrome on my Mac to update the Meshtastic firmware on my ThinkNode M5. Chrome does not see the device plugged into a usb port. I'm sure my usb cable is a data cable, and I believe my settings are correct on the Mac and in Chrome. I've seen people say that I might need to hold down a button when plugging the device into the usb port. Is this true? If so, which button?

ThinkNode M5 not discoverable to Meshtastic app in iOS

JohnGourlay — Sat, 28 Mar 2026 21:00:50 +0000

I have a new ThinkNode M5 which I've charged up and powered up. Neither my iPhone bluetooth settings
nor the Meshtastic app see the radio as a bluetooth device. What do I need to do to make the radio discoverable?

my ThinkNode M1 works with Meshtastic, but I’m unable to get it running with Meshcore

Jully — Thu, 26 Mar 2026 02:06:09 +0000

we regret to inform you that we are currently not providing technical support for the MeshCore software. Customers need to contact the MeshCore team directly. Technical support can be found on the MeshCore Discord page/group.

For hardware-related technical support, customers can contact us.

CrowPanel 1.28" with ESP32-C3

bbroerman — Mon, 16 Mar 2026 23:51:54 +0000

I'm trying to use a QI standard wireless charging system with a CrowPanel 1.28" running an ESP32-C3. I've got a small LiPo battery connected to it. I'm planning on using this as a pocket watch (for my son), and want to be able to recharge the battery wirelessly.
I have the output of the QI receiver module (5v 0.6a output) connected to a USB-C plug connected to the USB socket of the CrowPanel board. It will run the CrowPanel very nicely without the battery connected, but once I hook up the battery it causes the transmitter (I have a generic one from Amazon) to just flash slowly.
I'm going to test it when the battery is low enough to not run the board, and see what I can do there, but I'm really hoping someone out there has a suggestion to get this working properly!

How to track a car with ThinkNode M3 LoRaWAN

Jully — Wed, 18 Mar 2026 09:54:10 +0000

The M3 tracker requires a gateway to operate. The M3 can connect to a self-deployed gateway or a LoRaWAN network provided by an operator (in which case, you don't need to deploy your own gateway).

Within the gateway's coverage area, the tracker can upload location data online in real time. When the node leaves the coverage area, it automatically stores the location information locally. Once it re-enters the gateway's coverage area, the stored data is automatically uploaded to the application, thus completing the recording of offline movement trajectories and generating continuous path playback. The tracker can also be configured through the backend panel to implement different tracking modes, transmission/reception frequencies, audible and visual alarms, tracking history, and others.

Here is the user manual. You can have a look if needed.

https://www.elecrow.com/download/product/ILM13803D/ThinkeNode-M3_User_Manual-Tracker_Version.pdf

thinknode m3 lorawan. can it operate alone and work for gps tracker on a vehicle ?

Jully — Wed, 18 Mar 2026 09:52:43 +0000

Question:
thinknode m3 lorawan..Can it operate alone and work for gps tracker on a vehicle and does it wants another device to communicate with(gateway)?

Answer:
This cannot operate independently; it requires a gateway device.

ILM13205D : It isn't exchanging keys with other nodes. Messages keep appearing: “No channel,”

Jully — Wed, 18 Mar 2026 09:47:39 +0000

Product SKU:
ILM13205D
Thinknode M5
Question:

I'm having a problem with the device. It isn't exchanging keys with other nodes. Messages keep appearing: “No channel,” “Message encryption failed.” Leaving the device on all night with GPS enabled also did not result in a successful public key exchange with other nodes. I only have contact on the medium_fast public node. People tried to message me, but nothing went through.

Answer:
Please perform a factory reset on the device via the Meshtastic app, or re-flash the Meshtastic firmware onto the device. Afterward, please follow the tutorial at the link below to create a custom channel; have both parties join this channel to see if messages can be successfully sent and received.

https://www.elecrow.com/wiki/ThinkNode_M5_Meshtastic_LoRa_Signal_Transceiver_ESP32-S3.html#same-settings-on-the-receiving-side-as-on-the-transmitting-side