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T-Call V1.4

T-Call V1.4

ESP32 Wireless Module SIM Antenna Development Board

Regular price $26.52 USD
Regular price Sale price $26.52 USD
Sale Sold out

⚠️If you need technical support, you can get a quicker response on our GitHub (the tech team will check it directly). Please provide your Tax/Personal ID (if available), this will expedite the shipment of your order.

Instructions Before Order

If you order the wrong product or want to add another or change your shipping address, please re-edit the correct information and place a new order, then contact us to cancel the incorrect order.

If you have a tax ID or personal ID please provide as much as possible, otherwise, if your country requires this information we will block your order and contact you via email, which will slow down the shipment.

We strongly recommend choosing DHL or FedEx if your order is over $200.

Generally, except for DHL or FedEx, we will automatically split orders over $150-200 into two packages due to customs clearance, loss prevention issues, etc.

For more please check here

Shipping & Delivery

Methods & Delivery Time

  1. Standard Express: 25-30 Days
  2. EUB: 25-30 Days
  3. YunTu Express : 10-20 Days
    (Company name can't be used consignee)
  4. DHL: 10-17 Days
  5. FedEx: 10-17 Days
  6. YanWen: 20-35 Days

Please note that all delivery times are estimated for reference only.

During ship, maybe some methods of transport do not update the logistic track until the parcel reaches the destination country.

If you do not see one of the above shipping methods when checking out, it may be because your country does not support that shipping method, please select one of the available channels already listed or contact us for help.

Please make sure your address is fully filled in (including province and continent, which will affect the shipping time of your order)

For more details please check our shipping policy.

About Tax

At present, the price of the platform does not include any tax.
European customers should pay attention to the tax problem after the package reaches the local country, which needs to be borne/handled by the customer, the local policy shall prevail

[orders over 150 euros may generate tax (Amount for reference only), for orders over this amount, we will not inform the customer separately, so please pay attention to it by yourself.]

ESP32 Wireless Module SIM Antenna WiFi Bluetooth Development Expand Board Devkit for Arduino

Specifications For SIM800

SIM Nano Card Slot Yes [2G]
Clock Speed 240Mhz
Flash 4MB/8MB
Wireless Connectivity Wi-Fi: 802.11 b/g/n
Bluetooth: v4.2 BR/EDR and BLE
Button EN
Charging IC IP5306
Serial Chip CH9102
Peripheral Interfaces  I2C、SPI、UART、SDIO、、I2S、CAN
Power Supply

Support USB Type-C / Li-Po Battery Dual Power Supply

JST Connect type: JST PH 2pin 2.0mm

[USB can power the battery]


Supports pin extension of Mic and Speaker 

[Ship without mic and speaker by default]

For T-Call A7670



Connect the power supply, click to start, after the start, click to reset, and click twice to shut down.

Sample Code For Reference [Github]

If you need technical support please check the below link to find more details.

For T-Call SIM800

1. Size

2. Pin Diagram


1 X SIM800H

1 X Power Cable(PH 2pin 2.0mm)

1 X SIM Antenna(~7 cm)

2 X Pin

T-Call A7670

GSM/GPRS Antenna

View full details

Customer Reviews

Based on 5 reviews
Not working module

I received t call v 1.4 but it wasnt working. No lights were flashing. But computer recognised the module. I could upload a programm.but sim800l wasnt working.I contact the aervice but the responses were not as i i expected. I also asked to order a new one with diacount but no answer

Hi Sir,

We have checked our communication records again and our communication stopped on the 11th of July and we have not heard back from you again, please check your inbox again and we will also email you again to help you with your problem.

Richard Nepil
Didn't read that 2g was getting discontinued.

Would have been nice if there was a disclaimer on the website, but the onus is on me.


All OK !

Mieszko Ślusarczyk
Too many revisions, documentation could be better

This device has so many revisions that it’s hard to guess what hardware does the specific have. Documentation could be better too, especially for less experienced tinkerers with stuff like ESPHome examples

Hi Sir,
Thank you for your feedback.
You can check out our sample code in GitHub before purchasing.
If you have any difficulties with the product, please feel free to contact us by email, our engineers and customer service will help you to solve the problem.

Wish you have a great day.

Veselin Georgiev
excellent device and support

Very nice device.