johnsonsec

@brian-johnson · Joined April 2026

Newcomer

IT and security admin · software · 20 years in the field

Topics: 1
Replies: 24
Points: 0

Newcomer10 points to Member

Topics Engaged In

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Solved ESP8266 as a local MQTT broker so the sensors keep working when the internet drops?

by jason_fw in Gateways and edge · 5 replies

5 6 2 days, 19 hours ago by wilsonmaker

Solved Sensors on campus lamp posts with no wiring, can we power them wirelessly?

by davidp11 in Hermetry City · 6 replies

6 6 3 days, 3 hours ago by reddysi

Solved ESP32-WROOM vs WROVER vs MINI: what do the module names mean and which do I buy?

by rahulr29 in Supported devices and hardware · 8 replies

8 7 1 week, 6 days ago by rahulr29

Total beginner from New Zealand, workshop sensors

by maker_wei in Introductions · 3 replies

3 3 3 weeks, 6 days ago by maker_wei

Solved Twenty DS18B20 probes on one Pi: dropouts past eight sensors and how to name the keys

by wilsonmaker in Raspberry Pi · 7 replies

7 6 4 weeks, 1 day ago by johnsonsec

Solved Trailer tracker on a NodeMCU: map card says no rows with valid coordinates

by jason_fw in Dashboards and widgets · 7 replies

7 6 1 month, 1 week ago by jason_fw

Solved Switching a server room split AC off and on from Hermetry with a 16 A plug relay

by emily30 in Supported devices and hardware · 5 replies

5 4 1 month, 3 weeks ago by emily30

Solved ESP8266 intercom buzzer detector: how do I get a ping on my phone?

by wilsonmaker in Alarms and notifications · 6 replies

6 4 1 month, 3 weeks ago by lynchlab

Solved How do I draw the terminal strips in the wiring diagram for a gateway panel?

by carlosc76 in Supported devices and hardware · 5 replies

5 4 2 months, 1 week ago by thompsonplc

Solved EKF on a Pi estimating tank inflow and outflow: is the leak coefficient even observable?

by ciaran55 in Telemetry data and history · 5 replies

5 5 2 months, 1 week ago by ciaran55

Solved Raspberry Pi polling the latest tank level over the API keeps getting 401

by dev_kevin in REST API · 4 replies

4 3 2 months, 2 weeks ago by johnsonsec

Solved ESP-01 powered from the Uno’s 3.3 V pin keeps rebooting during Wi-Fi connect

by ciaran55 in Arduino · 4 replies

4 3 2 months, 2 weeks ago by wilsonmaker

Solved Inverters on RS-485 and serial-radio sensors: what gets non-IP gear into Hermetry?

by carlosc76 in Gateways and edge · 7 replies

7 6 2 months, 3 weeks ago by carlosc76

Solved Building a mains-powered gas monitor box for a UK boiler room: which rules apply?

by sneha_dev in Hermetry Safe · 8 replies

8 7 3 months ago by sneha_dev

Solved Measuring 1250 °C in a pottery kiln and getting told when a firing runs away

by johnsonsec in Alarms and notifications · 6 replies

6 6 3 months, 2 weeks ago by johnsonsec