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    BSEC + DevKit + BME688: Odd Gas Resistance Values

    S_Brohl
    New Poster

    Re: BSEC + DevKit + BME688: Odd Gas Resistance Values

    Hi Robin,

    Thank you for your reply! I actually am using the official code from the Bosch GitHub repository on my ESP8266 for the single sensor kit, and for my 8 sensor devkits I am using the provided software for those.

    I'm just wondering if there is any insight from BST on what this issue could be that I'm observing.

    Single Sensor Adafruit Board:

    TimeTempPressureHumidityResistance0Resistance1Resistance2Resistance3Resistance4Resistance5Resistance6Resistance7Resistance8Resistance9
    1.65E+0928.4499475.0241.8638550588230890.6254473.2213611518164081656623213555.8454102603951.6698499.3
    1.65E+0928.8199473.2537.441.02E+08576414.3594484.8670788253682834595793480977673684.2769490.9829821.7
    1.65E+0928.999472.4436.961.02E+08680398.7694237.3841932267202635675096556219.4753356.6830831.6886964.1
    1.65E+0928.9599470.38371.02E+08716835.8730645.8906194771702416087312581818.2785426.6866694.9906395.3
    1.65E+0928.9799470.1136.441.02E+08741760.3760490.2953667175992586431404602884.9807252.7885813.1943996.3
    1.65E+092999470.336.321.02E+08758378.1782725982843478448656642611627835.7832858.9909413.9961954
    1.65E+0929.0299471.7136.421.02E+08777820801565.61019539580828816846636639600.3850498.3932392.4969467.4
    1.65E+0929.0199469.936.451.02E+08791344.7825307.31047905384128377081911653061.3865595.9949246.8996351.3
    1.65E+0929.0299470.236.441.02E+08803925.4828814.31071550083998977142110651814.1869454.4944649.4990568.3
    1.65E+0929.0199468.2636.191.02E+08813990.4831337.51070499885780107275311658732.7879536.2961276.71015621
    1.65E+0929.0199469.4836.661.02E+08820348.5840032.81099597387079467398510676354883520.39619541018652
    1.65E+0929.0199470.636.651.02E+08831337.5852090.71095187287920587433757679045.1882378.3963311.41008122
    1.65E+0929.0199468.3837.341.02E+08814476.1837456.61067361685045427114199661285.1877839.7953889.11007378
    1.65E+0928.9999470.9436.811.02E+08818872.4841586.21094090287638417515597667753.5881239.3970846.21014866
    1.65E+0928.9999467.9536.811.02E+08825307.3849968.91107401188347267464237672357.2893932.8972921.61026309
    1.65E+0928.9999466.936.741.02E+08839516.3860142.81122191889873837572915686557.2903994.7983433.41026309

     

    8 Sensor DevKit - Brand New - Sensor 1
    Resistances in log10 format*

    TimeTempPRHR0R1R2R3R4R5R6R7R8R9
    1.65E+0927.65259994.662243.399355.5476033.7547193.7547193.8136263.883043.9534563.7547194.0995484.382774.540066
    1.65E+0929.27546994.641836.238895.9411874.3237354.4016035.107214.9739114.9064964.3048474.637834.7566714.822441
    1.65E+0930.34981994.692834.216346.3731864.5555164.6247655.4098725.2158125.1261854.4954874.8289144.8987694.937977
    1.65E+0931.29777994.729732.470656.5465944.6522134.7312725.5257155.3405185.2054794.5707784.9102054.9755915.008566
    1.65E+0932.14968994.698431.370256.6497544.7109234.7814895.6013825.3657635.2429964.6129164.9643515.0276675.054516
    1.65E+0932.99401994.722729.632516.7188764.7418164.8120835.638775.4030595.2719954.6360655.0026385.0556725.078842
    1.65E+0933.79791994.735328.59886.7784164.7654794.8389835.673645.4268745.3018794.6517565.0190745.0806775.103642
    1.65E+0934.34395994.74127.410946.8362954.7936594.8598515.6996075.4567815.3336064.680135.0450985.0985035.120774
    1.65E+0935.00123994.712226.828786.8662124.8003564.8661625.7102485.4597055.3311454.68385.0536515.1078625.128915
    1.65E+0935.49925994.70625.726056.8709134.8074854.8725665.719825.4693455.3394054.6889925.0612035.1150985.136863
    1.65E+0936.10093994.773625.266766.8945854.815734.8809975.7309755.4780555.3495294.6944985.068595.1224585.141421
    1.65E+0936.48013994.759624.745656.9437414.8251554.886845.740325.4932365.3687274.7018645.0761055.1268665.140013

     

    8 Sensor DevKit - Old/Current kit - Sensor 1
    Resistances in log10 format*

    TimeTempPRHR0R1R2R3R4R5R6R7R8R9
    1.65E+0927.49731994.447644.394495.3992143.884913.9527254.5002914.51574.5323693.9763624.5640114.8915725.074893
    1.65E+0929.02353994.432136.599936.8871635.0026385.028215.8577065.8145395.7829284.9809165.1698175.2878315.360479
    1.65E+0929.90529994.433434.274327.3847955.2715195.2932966.2070146.1474246.1049095.2158125.3622335.4330385.479204
    1.65E+0930.77458994.470332.798147.5795655.3897485.3985776.349796.2900376.2422175.3249175.44675.5061015.541805
    1.65E+0931.56893994.482731.598027.7147335.4637575.4753866.4533956.3865346.3337215.394145.4968165.5494025.591088
    1.65E+0932.22091994.471931.040427.8450885.503665.5139246.5314636.4418056.3838315.4333835.5373975.5910885.618483
    1.65E+0932.89288994.450230.352537.8419685.5261435.5360846.5545046.4690336.4161845.4560535.5566765.6150615.644344
    1.65E+0933.61231994.486128.575677.8901375.5571355.576696.5966866.5171036.4616045.4818985.5933275.6390475.667384
    1.65E+0934.11192994.465327.639957.9653755.5822465.5938266.6252536.5516626.4897355.502045.609335.6519845.677559
    1.65E+0934.65649994.491526.647187.9456375.5933275.6036756.6402736.5663536.5152765.5130945.6198065.6641435.68922
    1.65E+0935.22356994.477725.758037.9704525.6075235.6192776.662366.5833826.5266245.5261435.6283735.6763495.702163
    1.65E+0935.62075994.46625.175937.9817415.6090725.6190126.662366.5889026.5355385.5240115.638775.6836575.709922
    1.65E+0935.98298994.460824.560517.9992455.6270235.638776.6871776.6091156.5468745.5413625.6463125.6889095.710575
    1.65E+0936.45762994.457223.960728.0097915.6319025.641276.6898946.6117096.5494025.5449175.6480065.6942255.71749
    1.65E+0936.80986994.455623.480948.01035.6310855.6426656.693026.6169446.5525135.5512095.6548485.7021635.730975
    1.65E+0937.05718994.416123.254658.01035.6382175.6531286.7013366.6276086.567825.5553035.6559995.707325.728585
    1.65E+0937.4269994.451522.899478.01035.6421065.6537016.706166.6255886.5675265.564545.6638495.7079695.73545
    1.65E+0937.74416994.436522.620338.01035.6465945.6539876.7089996.6259246.5672335.555765.6603435.7044115.728926
    1.65E+0938.03395994.496722.545938.01035.6482895.6606346.7041436.6279456.564895.555765.6562885.7002445.728585
    1.65E+0938.31625994.497822.259138.01035.6426655.6494236.6977526.6235786.5599555.5539345.6548485.7053795.734758
    1.65E+0938.61852994.465821.768068.01035.6474415.65866.7085926.6309946.5701785.5589745.6641435.7099225.733035
    1.65E+0938.76342994.456221.293548.01035.6516995.6603436.7118566.6323576.5704745.5636075.6635565.7079695.736489
    1.65E+0939.01324994.457821.116248.01035.6508445.6609256.7143216.6350946.5743365.5612855.6650245.7118845.738923
    1.65E+0939.27555994.453220.834838.01035.6525565.6600526.7130876.6299766.5695885.5612855.6664985.7076445.736489
    1.65E+0939.38547994.404921.036678.01035.646035.659186.7110386.6282836.5654755.5589745.66185.7060255.732347

     

    1.02E+08 is equal to 8.0103 in Log10 format. So on both sensors I am seeing these same values. I see the same values with the new kit too, but not as observably prevalent as I do between these two.

    I'm begininning to think these sensors have gone bad now that I have this new kit which is not showing this same behavior.  Any thoughts from BST on this?

     

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