def requestB(self):
work_context = self.getContext()<EOL>self.setContext("<STR_LIT>")<EOL>self.m_serial_port.write("<STR_LIT>".decode("<STR_LIT>") + self.m_meter_address + "<STR_LIT>".decode("<STR_LIT>"))<EOL>self.m_raw_read_b = self.m_serial_port.getResponse(self.getContext())<EOL>unpacked_read_b = self.unpackStruct(self.m_raw_read_b, self.m_blk_b)<EOL>self.convertData(unpacked_read_b, self.m_blk_b, self.m_kwh_precision)<EOL>self.m_b_crc = self.crcMeterRead(self.m_raw_read_b, self.m_blk_b)<EOL>self.setContext(work_context)<EOL>return self.m_b_crc<EOL>
Issue a B read on V4 meter.

        Returns:
            bool: True if CRC match at end of call.