Page 3 – Hermetry

Posted March 16, 2026 at 2:49 am · in Request: people and forklift detection on camera streams, or should that run at the edge? #3

What does a GPU box cost for 9 cameras? We looked at it for trailers and it got expensive fast.

Still waiting for the gateway to reconnect.

Posted March 3, 2026 at 7:45 pm · in Twelve Nanos across an 80 m greenhouse: least wiring back to one gateway? #4

Total newbie question: why not just LoRa on each node and skip the cable?

Still waiting for the gateway to reconnect.

Posted February 16, 2026 at 2:57 am · in Button on a board to open the yard gate, but my command doesn’t show up in the control settings #2

Could you make it a switch that writes a telemetry value and have the ESP32 watch for that? That’s what I did for a light.

Still waiting for the gateway to reconnect.

Posted January 10, 2026 at 1:26 pm · in ESP8266 only reaches the broker when I give it a static IP, and IT won’t allow static IPs #3

Could you just connect to the broker’s IP address instead? Then DNS doesn’t matter.

Still waiting for the gateway to reconnect.

Posted December 25, 2025 at 1:08 pm · in MAX485 on our gateway dies every few weeks on an 80 m bus between two buildings #6

ok not the chips then, good to know

Still waiting for the gateway to reconnect.

Posted December 23, 2025 at 4:35 pm · in MAX485 on our gateway dies every few weeks on an 80 m bus between two buildings #2

Cheap clone chips? We had a batch of clone transceivers that were all bad.

Still waiting for the gateway to reconnect.

Posted December 6, 2025 at 2:37 am · in Uploading to a Nano through an HC-05 fails with stk500_getsync not in sync #3

Total beginner question, but why not put the Nano’s job on the ESP32 and update that one over Wi-Fi?

Still waiting for the gateway to reconnect.

Posted November 30, 2025 at 3:21 pm · in Pallet tilt from an MPU-9250: computing pitch and roll, and why my raw samples get dropped #6

Changed to a complementary filter on the ESP32 and a message every 10 s with tilt_max, no more drops or closed sessions. Tipped the test pallet by hand in the warehouse: tilt_max 78 and the alarm fired within the same second. Dropped yaw like ciaranwalsh55 said, it was jumping around in the trailer.

Still waiting for the gateway to reconnect.

Posted November 26, 2025 at 2:22 pm · in ESP32 scanner finds my sensors on GPIO32/33, the libraries do not #3

Following, I have the same board coming next week.

Still waiting for the gateway to reconnect.

Posted November 12, 2025 at 1:13 pm · in Our founder wants ESP32s instead of PLCs now that Hermetry has the data. How do I argue it? #5

The downtime number is what would’ve convinced me too. Fair.

Still waiting for the gateway to reconnect.

Posted November 5, 2025 at 6:18 pm · in STM32 with a MAX3485 gets my own echo and loses the start of the Modbus reply #2

Did you try swapping A and B?

Still waiting for the gateway to reconnect.

Posted November 4, 2025 at 1:26 pm · in Tapping a 4-20 mA loop that already feeds a locked PLC without disturbing it #3

Dumb question maybe, but why not read the value from the PLC over the network?

Still waiting for the gateway to reconnect.

Posted November 1, 2025 at 2:22 pm · in Our founder wants ESP32s instead of PLCs now that Hermetry has the data. How do I argue it? #2

Founder here (not Eric’s!). Honestly I’d have the same instinct. What’s the real argument beyond “PLCs are the industry standard”?

Still waiting for the gateway to reconnect.

Posted October 19, 2025 at 1:09 pm · in Broker address typed into a config page as text: how do I turn the string into something the ESP32 can use? #2

You could split it on the dots and atoi each part, then IPAddress(a, b, c, d). That’s what I did once.

Still waiting for the gateway to reconnect.

Posted October 14, 2025 at 1:36 pm · in smbus2 write_i2c_block_data: what is the “cmd” byte for an ADS1115? #2

Isn’t cmd a code the chip defines, like “start conversion”?

Still waiting for the gateway to reconnect.

kevin.cto

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