On the motherboard are placed test points. I was able to create a CNL schematic diagram. I analyzed the connections of the systems on the motherboard. Having access to specialized equipment, I desoldered the PD70F3769 and CC2430 chips. Positive and Negative overvoltage protection controller. The PD70F3769 microcontroller works with flash memory MX25L1606-8006E_DS_EN Therefore, we have to focus on the MX25L memory and the PD70F3769 microcontroller. The chip is set up and programmed each time it is started. I know from experience that the 8051 does not support all standard functions, so it's good to read the documentation and erate. It is a texas instrument RF chip, RF transceiver with an industry-standard enhanced 8051 MCU, 128 KB flash memory, 8 KB RAM. On the this side has a radio chip CC2430-F128. We can omit it because it is not involved in connecting the CNL with the pump. This is probably the system used to measure the glucose from the sample on the test strip. Thanks to the It is a battery cell level indicator circuit. On the Top side, there are one unknown ICsġ? HSS 064 67 or S7T S57 44 Its function is unknown.Ģ? The second chip was recognized as MAX 17040. The discussed microcontroller has : Renesas microcontroller The main integrated circuit is the Renesas PD70F3796 microcontroller. As a result, Medtronic 630G / 640G pumps may not be suitable for OpenAPS solutions Hardware Overview, what I have discovered Front Unfortunately, the possibility of remotely changing the base level has not been discovered. We need to figure out how the AES key is generated by the firmware to figure out how to connect our own custom radios to the pump. So with a CNL24 alone, we can read Medtronic CGM and pump settings over USB, but if we want to loop with the pumps, we have to get direct over the air access. The current issue at hand, is that the CNL24's USB layer appears to block writing actions, and only supports reading. A good portion of the protocol is already discovered by Pazaan on his repo at. The OTA protocol layer is 802.15.4 spec, and pretty sure its ZigBee.
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