Comments: Photon Weather Shield Hookup Guide V11

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  • The guide mentions that to have the alternative power source (barrel jack / screw terminal) route power through the Photon regulator, the Power Select jumper has to be modified to: VREG RAW---P_VIN

    Then, it mentions that to be able to safely power the Photon/Shield through both micro USB and alternative power source at the same time, the 3.3V Disable jumper trace has to be cut.
    However, it warns only to do that if the above Power Select jumper has not been modified: but what if I want both functionalities? Is it not possible, or does modifying the Power Select jumper already cover the 3.3V Disable function as well?

    I'm planning on using it with a Sunny Buddy, connecting the Shield as a load and a LiPo battery through the JST connector, and with an untouched Power Select jumper, it only powers the Photon if the 3.3V Disable jumper is closed. I've also tried it with a LiPo Booster, although it won't be connected to it that way, by connecting it to both the boosted and unboosted pins, always with the same results.
    In both cases, the Photon is powered up if the source is connected through the VIN+GND header pins, but not through the screw terminal...

    • Hi there, it sounds like you are looking for technical assistance. Please use the link in the banner above, to get started with posting a topic in our forums. Our technical support team will do their best to assist you.

      I am not quite sure I understand what you are trying to do, but here is the schematic for the weather shield; it shows how the power and jumpers interact.

  • To power my Photon Weather Shield, I purchased a 9V AC adapter wall wart (TOL-15314). By all accounts, this should be acceptable for the rated voltage of the 3.3V regulator on the shield (no modifications were made to the shield itself; no traces cut nor solder jumpers jumped. I understood the shield to come configured to accept ~2.5-11.5V in its default configuration).

    Whenever I plug the board in, the regulator goes into thermal shutdown. It usually takes several minutes, but eventually it just locks everything up. I've been considering buying either a 5V wall wart, tacking on a heat sink, or swapping the MIC5205 3.3V regulator for a different regulator, but I figured I'd ask...am I crazy? I have my setup enclosed in a Big Red Box (PRT-11366) and the reg gets so hot that it actually effects the readings of the shield's onboard temp sensor...

    • Hi there, it sounds like you are looking for technical assistance. Please use the link in the banner above, to get started with posting a topic in our forums. Our technical support team will do their best to assist you.

      That being said, if i understand what you are doing... you are powering both the photon and the shield with their respective inputs. In that case, you might be having an issue on the 3.3V line where you have 2 voltage regulators (one on the photon and one on the shield) fighting each other, which could strain and damage one of the voltage regulators (making it appear that it is in thermal shutdown).

  • what are the ecological standards on this sensor and where can I find them? ps : i am french so if you can answer in french its not bothering me thank

    • Hi,

      I'm confused about what you are asking for? Are you asking if the sensor has been used with environmental monitoring standards or the process for using the sensors to monitor the environment? The closest that I can find is this Hackster.io tutorial using the sensor readings to analyze and visualize data but I am not sure if the sensor readings have ever been compared to any national standards?

      You may want to check or post in the SparkFun forums to see if anyone in the community has done this before.

  • When I try to open the SparkFun_Photon_Weather_Shield_V11.sch in Altium, a blank schematic opens up. Could you verify that this still works?

  • Can you post the recommended connectors for the I2C, Serial, Soil Moisture and Temperature sensors? Preferably screw terminals.


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