I recently ditched my Acurite all-in-one via RTL_433 for an Ambient setup with data capture via Ecowitt GW1100B. I couldn't be happier having access to the data without jumping through a bunch of hoops. I'm also still bitter about the Acurite SmartHub drama a few years ago.
Anyway, I've moved weewx to capture data via the GW1000 API. I am getting data, and most of that data appears to be accurate, minus the pressure. Before configuring any pressure offsets in the GW1100, I confirmed I was seeing data in Weewx (via debug output - note, I'm not sending data to Wunderground from Weewx, just using the data locally): *LOOP: 2022-07-26 17:42:17 EDT (1658871737) altimeter: 30.039101382806564, appTemp: 89.46208415470079, barometer: 30.026459802683856, cloudbase: 899.6153853914325, dateTime: 1658871737, daymaxwind: 10.2, dayRain: 0.1811023622047244, dewpoint: 75.94169230427771, heatindex: 80.65700000000001, humidex: 99.87324145788232, inDewpoint: 56.30802378104585, inHumidity: 51, inTemp: 75.74000000000001, luminosity: 16097.0, maxSolarRad: None, monthRain: 0.7716535433070867, outHumidity: 91, outTemp: 78.80000000000001, pressure: 29.766227400000002, radiation: 127.0481452249408, rain: None, rainRate: 0.0, relbarometer: 1008.0, stormRain: 0.1811023622047244, usUnits: 1, UV: 1, uvradiation: 20.0, weekRain: 17.6, wh65_batt: 0, wh65_sig: 4, windchill: 78.80000000000001, windDir: 316, windGust: 1.1184709259696521, windSpeed: 0.4473883703878609, yearRain: 0.7716535433070867* Weewx shows the *correct* barometer: 30.038 inHg (matching my local WX station almost perfect - 30.04), however WXView/GW1100 shows 29.76 (as does Wunderground which is connected to GW1100, not Weewx). In order to get the correct pressure in WXView/Wunderground, I used the Pressure Calibration utilit <https://caboose700.github.io/ws-barometer-offset-calculator/>y linked on WSForum <https://www.wxforum.net/index.php?topic=40645.0>. Based on my altitude (250ft/76.2m) and the pressure reported from WSView without any offsets configured, the reported pressure is *29.76 *- note, this is what relbarometer from Weewx above directly translates to. My local WX station <https://aviationweather.gov/metar/data?ids=KRDU&format=decoded&hours=0&taf=off&layout=on> currently reports *30.04*. Using the calibration calculator, this gives me a relative offset of +8.7 hPa and ABS offset of -8.4 hPa. When I do this, WSView (and Wunderground) report Relative as 30.07 and Abs 21.37. The relative pressure is close to 30.04. When I go back to look at Weewx, altimeter and barometer are None! *LOOP: 2022-07-26 17:47:40 EDT (1658872060) altimeter: None, appTemp: 89.69719196303436, barometer: None, cloudbase: 750.1857129645515, dateTime: 1658872060, daymaxwind: 10.2, dayRain: 0.1811023622047244, dewpoint: 76.41918286295598, heatindex: 80.553, humidex: 100.2012467210435, inDewpoint: 57.01182055322032, inHumidity: 52, inTemp: 75.92, luminosity: 15741.0, maxSolarRad: None, monthRain: 0.7716535433070867, outHumidity: 93, outTemp: 78.62, pressure: None, radiation: 124.23835832675611, rain: 0.0, rainRate: 0.0, relbarometer: 1018.3, stormRain: 0.1811023622047244, usUnits: 1, UV: 1, uvradiation: 19.2, weekRain: 17.6, wh65_batt: 0, wh65_sig: 4, windchill: 78.62, windDir: 316, windGust: 1.1184709259696521, windSpeed: 0.22369418519393044, yearRain: 0.7716535433070867* My issue is that the pressure data in Weewx doesn't match the calibrated data coming from GW1100. Given that I believe barometer value is calculated in Weewx, I'm at a loss for why these are showing as None? I even lowered the MinMax values, but still None. Here is my configuration if that would help: weewx.conf <https://bubba.d.pr/C6vcpL>. I appreciate any guidance or direction on this; I've been pulling my hair out for a few days. Thanks! -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/7a67f5d7-be8b-4ddd-8dad-9763dac78581n%40googlegroups.com.
