SIM900 GSM/GPRS Shield

Marsoni

M251S

$697.50

Get it in 3 business days with 1 day shipping. Friday, May 29

SIM900 GSM/GPRS ShieldThe SIM900 GSM GPRS shield is compatible with Arduino. It is based on the SIM900 module from SIMCOM. The GPRS shield provides you a way to communicate using the GSM mobile phone network. The shield allows you to reach SMS, MMS, GPRS and Audio via UART by sending commands (GSM 07. 07, 07. 05 and enhanced SIMCOM to commands). The shield also has the 12 GPIOs, 2 PWMs and an ADC of the SIM900 module (they are all 2V8 logic) present on board.

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We offer a 30-day return/exchange service after receiving.
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Looks like a silly little thing, I am not a coffee enthusiast. But it does exactly what it is supposed to do and with high quality. The device (a stretch to call it that) is made of sturdy materials including the needles. They give you two different thicknesses of needles, one for expressi (0.3) and one set for coffee grinds (0.4). Each comes wth some spares. The stand is well designed and keeps grinds from spreading all over. It is very elegant design. I use this with a dosing funnel on my portafilter. Not the cheapest one could buy but well worth the money.

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Reviewed in the United States on March 16, 2025

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Sunny

Louisville, US

★★★★★ 5

Well made, high quality product.

This product demonstrates excellent quality, featuring a robust construction and intuitive design for ease of use. It includes two distinct wire sizes and offers straightforward assembly. Its superior durability and strong magnetic properties ensure effortless reattachment to its stand.

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Reviewed in the United States on June 30, 2025

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Amazon Customer

Fort Morgan, US

★★★★★ 5

Perfect WDT tool

Best WDT I’ve found. Love that it includes 0.3mm needles (as I’ve found that 0.4mm needles push the grounds around too much), and the stand is very clever. It knocks off the residual grounds on the needles and is easy to use. As far as WDT tools go, I can’t imagine anything better.

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Reviewed in the United States on April 13, 2025

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MrEdmonds

Lexington, US

★★★★★ 5

Amazing quality build

This WDT tool is solid and well-made. Definitely worth having!

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Reviewed in the United States on June 26, 2025

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Amazon Customer