I'm developing an electrical system that can monitor multiple loads simultaneously; for this reason I use an ADE7953 for each load and my microcontroller communicate with the Meter via the SPI protocol.
If there is only one ADE in the network the communication take place without problem, but if I insert three Meter the microcontroller no communicate more.
This because when there are three Meter and one must transmitter the pins SDO of the ADE7953 go to 1.6V for the logical state 0; this voltage represent an undefined state for my microcrocontroller.
I tried to insert a pull down resistor on the SDO pin but this has not solve the problem.
have you any idea??
Thank you very much in advance!