Re: [Tinyos-help] sensirion tmote sensor issue
Thanks for your answer. Indeed, the issue is caused by the USB power. Fred - Original Message - From: Roman Lim [EMAIL PROTECTED] To: Frédéric JOSEPH [EMAIL PROTECTED] Cc: tinyos-help@millennium.berkeley.edu Sent: Thursday, February 28, 2008 10:18 AM Subject: Re: [Tinyos-help] sensirion tmote sensor issue are your motes usb- or battery-powered? in the usb-powered scenario, a voltage regulator heats up the pcb and you get slightly higher temperature measurements roman Frédéric JOSEPH wrote: Hi, My project consists in the development of a wireless sensor network based on Tmote Sky. I have some issues with the sht11 temperature sensor. The temperature read on sht11 is too high (4-5 °Celsius over the ambiant temperature). How can I resolve this issue ? Thanks in advance. Fred ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] sensirion tmote sensor issue
Hi, My project consists in the development of a wireless sensor network based on Tmote Sky. I have some issues with the sht11 temperature sensor. The temperature read on sht11 is too high (4-5 °Celsius over the ambiant temperature). How can I resolve this issue ? Thanks in advance. Fred ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
Re: [Tinyos-help] sensirion tmote sensor issue
are your motes usb- or battery-powered? in the usb-powered scenario, a voltage regulator heats up the pcb and you get slightly higher temperature measurements roman Frédéric JOSEPH wrote: Hi, My project consists in the development of a wireless sensor network based on Tmote Sky. I have some issues with the sht11 temperature sensor. The temperature read on sht11 is too high (4-5 °Celsius over the ambiant temperature). How can I resolve this issue ? Thanks in advance. Fred ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ___ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Sensirion Tmote sensor
Hi, I noticed that the sht11 temp/hum sensor it is affected with self heat produced by the microcontroler. I measured the internal temp of TI msp430 and read 29 Celsius , the temperature read on sht11 is 27-28 Celsius and ambient temperature is 23-24 Celsius. I wonder if the sht11 is glued in some way plus the soldering or it is only attach to the mote by the soldering pads?? I want to unsold and isolate the sensor. Anyone has a work around, or saw the same effect?? -Bill PD: I have 10 tmotes and all have the same issue. ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
[Tinyos-help] Sensirion Tmote sensor
Hi, I noticed that the sht11 temp/hum sensor it is affected with self heat produced by the microcontroler. I measured the internal temp of TI msp430 and read 29 Celsius , the temperature read on sht11 is 27-28 Celsius and ambient temperature is 23-24 Celsius. I wonder if the sht11 is glued in some way plus the soldering or it is only attach to the mote by the soldering pads?? I want to unsold and isolate the sensor. Anyone has a work around, or saw the same effect?? -Bill PD: I have 10 tmotes and all have the same issue. ___ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
