New: the AI firewall watches the whole platform and explains each incident in plain words. See how it works

Oğuz Özkan

oguz59

@oguz-ozkan · Joined May 2025

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Akıllı şehir mühendisi · su ve atık su

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Translated from Türkçe by AI ·

If you can’t cut the cable, the ACS712 is already ruled out, it connects in series. An SCT-013 clamp goes around the phase conductor and you don’t touch anything. At our pump stations we fitted one on each of the 3 phases.

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Translated from Türkçe by AI ·

Have you tried pinging raspberrypi.local? If mDNS is enabled, you’ll find it directly.

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The same applies to the device too, don’t set a static IP in the firmware. On one of our RTUs it was done that way, and for months we searched for why it wasn’t connecting.

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On a Pi 4 you don’t need to look at bus 1, 0 on the header. A completely empty table usually comes from one of two things, and I ran into the same thing on a site:1. SDA and SCL are swapped. Pin 3 is SDA (GPIO2), pin 5 is SCL (GPIO3). Follow the wiring again using the labels on the module, cheap cables often have mixed-up colours.2. On a 6-pin module, if CSB is left floating the chip can switch to SPI mode at power-up. Connect CSB to 3.3 V and SDO to GND and the address becomes 0x76; connect SDO to 3.3 V and it becomes 0x77.Quick check: with the Pi on and the sensor connected, measure the voltage of SDA and SCL against GND with a multimeter. Both should be around 3.3 V (the Pi has pull-ups). If you see 0 V, something is pulling the line down: a short circuit or a wrong pin.Once the address shows up, check the chip ID too: on a BME280 register 0xD0 returns 0x60. If it returns 0x58, you were sold a BMP280, which has no humidity sensor; there are a lot of them on the market.

sudo i2cget -y 1 0x76 0xD0
Accepted solution♥ 4

Translated from Türkçe by AI ·

A note: make the soil moisture sensor capacitive; resistive ones corrode out in the field within a few months. That’s what happened in our field.

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ESP32-S3 DevKitC ile denedim. Toprak Bey’in dediği odak sorunu ilk testte başıma geldi, değer Not Defteri’ne yazıldı 🙂 Programın F2 kısayolunu öne aldım, artık düzgün yazıyor. Komut Privileged + High impact, aralık 0.2-3.0. BT tarafı test bilgisayarında izin verdi, sahaya geçmeden önce resmi onay alacağız.

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Translated from Türkçe by AI ·

Summing watts with sum doesn’t give energy, you’re adding up each 10-second reading. 8640 readings per day × 0.9 W ≈ 7776, that’s where the number comes from.

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Translated from Türkçe by AI ·

Ayşe caught it, that’s the real issue. There are two things.Frequency: The Ra-02 is a 433 MHz module. On Hermetry the frequency plan is determined by the gateway, so if your friends’ gateway is on 868, the device also needs to be EU868. The join request sent on 433 is not heard by anyone, which is why the frames log is empty. Even if you fix the level shifting, you won’t join with this module.Voltage: As Büşra said, there’s no driving at 5V. I would do it this way: an 868 MHz SX1276 module (the RFM95W 868 version is common) and a 3.3V board. An ESP32 works, and so does a 3.3V Pro Mini. That way you don’t need a level converter. If it’s something battery-powered like a soil moisture sensor, the Pro Mini draws less current.On the Hermetry side, add the device as Class A, OTAA. In LMIC, select the EU868 region (CFG_eu868 in lmic_project_config.h), and pay attention to the byte order of DevEUI and AppEUI: LMIC wants LSB, AppKey wants MSB. Everyone gets stuck there on the first try.Regions and channels are here: Bölgeler ve frekans planları

Accepted solution♥ 7

Translated from Türkçe by AI ·

A browser cannot speak plain TCP MQTT, so WebSocket is a must. 8883 is the normal MQTT/TLS port, I think there is no WebSocket there. I honestly don’t know whether Hermetry has a separate ws port.

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Ekibe kendi master fikrini bıraktırdım 🙂 Modbus TCP’li bir master ile Pi üzerinden v1/gw yolunu denedik, 4 port, 4 child cihaz, teşhis değerleri dahil geliyor. İlk denemede gateway işaretini unutmuşum, forbidden_topic aldım, işaretleyince düzeldi. Teşekkürler Hakan Bey.

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Viewing 15 posts – 16 through 30 (of 36 total)