T-Call&PMU is an upgraded version of T-Call V1.3 Comparison of T-Call&PMU and T-Call V1.3: 1. Change the power IC to AXP192 PMU management, support coulomb counter and high precision voltage and current Test function. 2. SIM800L RI Pin leads to ESP32, can accept voice or data calls,Wake up from received meage. 3. The SIM800L DTR Pin leads to SP32, which can wake up SIMM800L from sleep state.
Notice: If you need to use 3.7V lithium battery as the only power source, notice that it will stop working if the voltage is lower than 3.9V. We recommend using a large-capacity battery (above 2000mah) to increase the battery life, or purchase the T-Call V1.4 5306 version. ( https://www.aliexpre.com/item/33045221960.html ) You can also consider connecting a 5V lithium battery, but you cannot connect a USB power supply at the same time. Our technical team is currently testing and trying to soe this iue, sorry for any inconvenience
More Information https://github.com/Xinyuan-LilyGO/LilyGo-T-Call-SIM800
You can choose to purchase T-Call & PMU acceories to add your own Notice: (shping does not include welding by default) https://www.aliexpre.com/item/1005003557965245.html
About shpingShping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer).
Special Announcement:Please fill in the correct and detailed consignee, address and phone number in the order. For fast and correct delivery.If you do not receive order within 30 working days,please feel free to contact Customer Service before leaving Negative and Neutral Feedback, we will do our best to help you resoe the problem.TaxNo, you will only pay what is quoted as total cost at checkout, no more. You are not expected to pay any additional duties or taxes. If you are asked by Customs or our logistic partner to pay duties, please contact our Customer Service .
Your 100% satisfaction is very ant to usIf the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.