Not enough data received in sam21d boards about embedded-i2c-sgp41 HOT 8 CLOSED

Hi Pascal, Good to hear from you. Here is the link to the board I'm using. It's similar to the esp266 but with some differences (the type of things that mess with your code). https://www.seeedstudio.com/Seeeduino-XIAO-Arduino-Microcontroller-SAMD21-Cortex-M0+-p-4426.html Regarding the pull-up resistors this is the type of connection I have ***@***.*** where R11 and R12 are 4.7KOhm each. The transistor is attached to the SDA and SCL coming out from the sam21d. Here is the code I'm using /* * I2C-Generator: 0.3.0 * Yaml Version: 0.1.0 * Template Version: 0.7.0-62-g3d691f9 */ /* * Copyright (c) 2021, Sensirion AG * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * * Neither the name of Sensirion AG nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include <Arduino.h> #include <SensirionI2CSgp41.h> #include <Wire.h> SensirionI2CSgp41 sgp41; // time in seconds needed for NOx conditioning uint16_t conditioning_s = 10; void setup() { Serial.begin(115200); while (!Serial) { delay(100); } Wire.begin(); uint16_t error; char errorMessage[256]; sgp41.begin(Wire); uint16_t serialNumber[3]; uint8_t serialNumberSize = 3; error = sgp41.getSerialNumber(serialNumber, serialNumberSize); if (error) { Serial.print("Error trying to execute getSerialNumber(): "); errorToString(error, errorMessage, 256); Serial.println(errorMessage); } else { Serial.print("SerialNumber:"); Serial.print("0x"); for (size_t i = 0; i < serialNumberSize; i++) { uint16_t value = serialNumber[i]; Serial.print(value < 4096 ? "0" : ""); Serial.print(value < 256 ? "0" : ""); Serial.print(value < 16 ? "0" : ""); Serial.print(value, HEX); } Serial.println(); } uint16_t testResult; error = sgp41.executeSelfTest(testResult); if (error) { Serial.print("Error trying to execute executeSelfTest(): "); errorToString(error, errorMessage, 256); Serial.println(errorMessage); } else if (testResult != 0xD400) { Serial.print("executeSelfTest failed with error: "); Serial.println(testResult); } } void loop() { uint16_t error; char errorMessage[256]; uint16_t defaultRh = 0x8000; uint16_t defaultT = 0x6666; uint16_t srawVoc = 0; uint16_t srawNox = 0; delay(1000); if (conditioning_s > 0) { // During NOx conditioning (10s) SRAW NOx will remain 0 error = sgp41.executeConditioning(defaultRh, defaultT, srawVoc); conditioning_s--; } else { // Read Measurement error = sgp41.measureRawSignals(defaultRh, defaultT, srawVoc, srawNox); } if (error) { Serial.print("Error trying to execute measureRawSignals(): "); errorToString(error, errorMessage, 256); Serial.println(errorMessage); } else { Serial.print("SRAW_VOC:"); Serial.print(srawVoc); Serial.print("\t"); Serial.print("SRAW_NOx:"); Serial.println(srawNox); } } And it comes from here: https://github.com/Sensirion/arduino-i2c-sgp41 I hope this helps, Regards, Javier

His Pascal, Thanks for the reply. I had new developments this morning. I placed a 4.7 resistor at the vdd input and the sensor started to give some data after the conditioning sequence. However, the sraw_vocx and the sraw_nocx are stuck at a value close to 65536 (which is the 2^16). I left the sensor more than an hour measuring to see if it changed but nothing happened. Any thoughts? All the best, Javier Aquest missatge, i els fitxers adjunts que hi pugui haver, pot contenir informació confidencial o protegida legalment i s’adreça exclusivament a la persona o entitat destinatària. Si no consteu com a destinatari final o no teniu l’encàrrec de rebre’l, no esteu autoritzat a llegir-lo, retenir-lo, modificar-lo, distribuir-lo, copiar-lo ni a revelar-ne el contingut. Si l’heu rebut per error, informeu-ne el remitent i elimineu del sistema tant el missatge com els fitxers adjunts que hi pugui haver. Este mensaje, y los ficheros adjuntos que pueda incluir, puede contener información confidencial o legalmente protegida y está exclusivamente dirigido a la persona o entidad destinataria. Si usted no consta como destinatario final ni es la persona encargada de recibirlo, no está autorizado a leerlo, retenerlo, modificarlo, distribuirlo o copiarlo, ni a revelar su contenido. Si lo ha recibido por error, informe de ello al remitente y elimine del sistema tanto el mensaje como los ficheros adjuntos que pueda contener. This email message and any attachments it carries may contain confidential or legally protected material and are intended solely for the individual or organization to whom they are addressed. If you are not the intended recipient of this message or the person responsible for processing it, then you are not authorized to read, save, modify, send, copy or disclose any part of it. If you have received the message by mistake, please inform the sender of this and eliminate the message and any attachments it carries from your account.

Hi Pascal, I don't think the peak current is an issue. Now, I have connected the sensor to a bench top power supply so the current shouldn't be a problem. Yes, the electronics and the heater are connected to that power supply. I've checked the board and it happens that the 4.7Ohm resistor is placed before bothe, vdd and vddh. Could be that the problem? All the best, Javier El 21 abr. 2023 13:31, Pascal Sachs ***@***.***> escribió: Raw values around the max value of 65536 indicates that the hotplate is not running. Did you connect VDD and VDDH to the same source as instructed in the datasheet? Also make sure that peak current is supported. You can also run the self test to see if all hotplates and MOx material are working correctly (command: 0x28 0x0E) — Reply to this email directly, view it on GitHub<#1 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A2DPOV43VOMCHEGL355WTL3XCJV2JANCNFSM6AAAAAAXD3OFUI>. You are receiving this because you authored the thread.Message ID: ***@***.***> Aquest missatge, i els fitxers adjunts que hi pugui haver, pot contenir informació confidencial o protegida legalment i s’adreça exclusivament a la persona o entitat destinatària. Si no consteu com a destinatari final o no teniu l’encàrrec de rebre’l, no esteu autoritzat a llegir-lo, retenir-lo, modificar-lo, distribuir-lo, copiar-lo ni a revelar-ne el contingut. Si l’heu rebut per error, informeu-ne el remitent i elimineu del sistema tant el missatge com els fitxers adjunts que hi pugui haver. Este mensaje, y los ficheros adjuntos que pueda incluir, puede contener información confidencial o legalmente protegida y está exclusivamente dirigido a la persona o entidad destinataria. Si usted no consta como destinatario final ni es la persona encargada de recibirlo, no está autorizado a leerlo, retenerlo, modificarlo, distribuirlo o copiarlo, ni a revelar su contenido. Si lo ha recibido por error, informe de ello al remitente y elimine del sistema tanto el mensaje como los ficheros adjuntos que pueda contener. This email message and any attachments it carries may contain confidential or legally protected material and are intended solely for the individual or organization to whom they are addressed. If you are not the intended recipient of this message or the person responsible for processing it, then you are not authorized to read, save, modify, send, copy or disclose any part of it. If you have received the message by mistake, please inform the sender of this and eliminate the message and any attachments it carries from your account.