These sensors work in the UART mode and you should connect sensors to UART pins. Therefore you cannot use the UART interface in the same configuration. (CC2530 P0.2 -> RX, CC2530 P0.3 -> TX).
PZEM-004 V3 – please, note that the firmware supports V3 only. This sensor type supports the write command.
write – resets the counter
Channel: l1, l2, l3 … l8