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6Instructables29,333Views12CommentsBucharest, RomaniaJoined February 3rd, 2016
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  • Raspberry PI USB vs SERIAL communication with gsm shield (itbrainpower.net a-gsm shield)

    Hello,We must take into account the fact that the gsm shield consumption it is dependent on the network condition (signal/band) and to the usage mode (Searching/Registration/Registered/Calling/Voice-including the RX volume/DTMF/SMS/DATA).... sometimes, may happen to need more current than RPI3 module can provide from 5V pin. In order to be on the safe side, I recommend to power RPI3/2/any other Linux board and the a-gsm in STAR/parallel mode. Alternatives:a. use our c-uGSM / h-nanoGSM or d-u3G modular shields (all having USB/serial connection capabilities) in Lithium Polymer/super-capacitor configuration instead the a-gsm module. You can see how to connect them with RPI3 in our how to/projects area: http://itbrainpower.net/a-gsm/gsm-shield-Arduino-R...b. You may check by soldering o...

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    Hello,We must take into account the fact that the gsm shield consumption it is dependent on the network condition (signal/band) and to the usage mode (Searching/Registration/Registered/Calling/Voice-including the RX volume/DTMF/SMS/DATA).... sometimes, may happen to need more current than RPI3 module can provide from 5V pin. In order to be on the safe side, I recommend to power RPI3/2/any other Linux board and the a-gsm in STAR/parallel mode. Alternatives:a. use our c-uGSM / h-nanoGSM or d-u3G modular shields (all having USB/serial connection capabilities) in Lithium Polymer/super-capacitor configuration instead the a-gsm module. You can see how to connect them with RPI3 in our how to/projects area: http://itbrainpower.net/a-gsm/gsm-shield-Arduino-R...b. You may check by soldering one >4700-1000uF/ >5V or one super-capacitor / 5V bw. GND and modem's 4V supply. Avoiding the pulse consumption in this way, the RPI and the modem can run on the safe side.Dragos

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  • RASPBERRY PI FREE STYLE POWERING (RPI POWER SUPPLY HACK)

    Hi Blue_Prairie,First, I thank you for your time spent for reading my instructable. Anyway, I just mention: "THIS POWERING CONFIGURATION BYPASS THE RPI BUILT IN POWERING PROTECTION!" I did not say g-SPS has no protection.;)You will be surprised to find, but this implementation it really works! I have tens of RPI3 deployed powered via g-SPS 5V version (in production environment, running IoT application, some of them having embedded 2G modem using the same g-SPS 5V power supply).. This g-SPS 5V version power supply has more current capabilities as specified. Also, you will be surprised to find about the place where you can add a electrolytic capacitor (Eg.: 1000-2200uF/6.3V as is implemented in the g-SPS 4V version), in order to increase the pulse current capability. Also, as ...

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    Hi Blue_Prairie,First, I thank you for your time spent for reading my instructable. Anyway, I just mention: "THIS POWERING CONFIGURATION BYPASS THE RPI BUILT IN POWERING PROTECTION!" I did not say g-SPS has no protection.;)You will be surprised to find, but this implementation it really works! I have tens of RPI3 deployed powered via g-SPS 5V version (in production environment, running IoT application, some of them having embedded 2G modem using the same g-SPS 5V power supply).. This g-SPS 5V version power supply has more current capabilities as specified. Also, you will be surprised to find about the place where you can add a electrolytic capacitor (Eg.: 1000-2200uF/6.3V as is implemented in the g-SPS 4V version), in order to increase the pulse current capability. Also, as more convenient implementation, you can use the g-SPS 5V board in conjunction with i-hatGSM3G adapted board, as described bellow:http://itbrainpower.net/a-gsm/i-hatGSM3G_d-u3G_c-u...Your definitely must test it! :)Regards,Dragos

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  • Raspberry PI USB vs SERIAL communication with gsm shield (itbrainpower.net a-gsm shield)

    Hi Fatih,The a-gsm shield it is 2G (GSM) only. If you need 3G communication, you can use our d-u3G modular modem. d-u3G has very same SERIAL and USB connectivity support for Raspberry PI (including Raspberry PI3) and other ARM Linux boards.More information about d-u3G shield, other modular shields and associated accessories/adapters can be found on our site (check the how to and project area, also).Kind regards,Dragos

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  • RASPBERRY PI FREE STYLE POWERING (RPI POWER SUPPLY HACK)

    Hi Rick,Not all power supplies can be used with Raspberry Pi. All version of RPi needs a stable power source with supplying voltage a little bit more than 5V (around 5.15V -> 5.25V), and current up to 1-1.5A. g-SPS 5V version fulfill those criteria. More of that, replicating this instructable, you can replace the standard way of powering Raspberry Pi (via USB connector) and have more advantages, like:- power from any other wall power adapters (that supplies 6.5-20V and 1A at output), even if does not have USB connector.- reuse your old wall power adapters. Eg.: old notebook wall power adapter.- you can use batteries for powering your RPi. Eg.: 2, or more cells Lithium Polymer batteries or Lead GEL batteries, even from NiMH rechargeable or classic Alkaline batteries (more than 5) con...

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    Hi Rick,Not all power supplies can be used with Raspberry Pi. All version of RPi needs a stable power source with supplying voltage a little bit more than 5V (around 5.15V -> 5.25V), and current up to 1-1.5A. g-SPS 5V version fulfill those criteria. More of that, replicating this instructable, you can replace the standard way of powering Raspberry Pi (via USB connector) and have more advantages, like:- power from any other wall power adapters (that supplies 6.5-20V and 1A at output), even if does not have USB connector.- reuse your old wall power adapters. Eg.: old notebook wall power adapter.- you can use batteries for powering your RPi. Eg.: 2, or more cells Lithium Polymer batteries or Lead GEL batteries, even from NiMH rechargeable or classic Alkaline batteries (more than 5) connected in serial mode.- you can power some additional boards used together with RPi, from the same power supply.- other stuffs

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