exo_sw_dissectors/Dissector/eps_dissector.lua

-- Define the dissector function
function dissect_power_system_data(buffer, pinfo, tree,HM_TM_dissector, offset, len,data3)

-- Define ProtoFields for each field in the structure
local f_pv_cnt = ProtoField.uint8("PowerSystemData.pv_cnt", "PV Count", base.DES)
local f_mppt_cnt = ProtoField.uint8("PowerSystemData.mppt_cnt", "MPPT Count", base.DES)
local f_op_conv_cnt = ProtoField.uint8("PowerSystemData.op_conv_cnt", "Operating Converter Count", base.DES)
local f_btry_cnt = ProtoField.uint8("PowerSystemData.btry_cnt", "Battery Count", base.DES)
local f_btry_temp_sns_cnt = ProtoField.uint8("PowerSystemData.btry_temp_sns_cnt", "Battery Temperature Sensor Count", base.DES)
local f_chnl_cnt = ProtoField.uint8("PowerSystemData.chnl_cnt", "Channel Count", base.DES)
local f_volt_rail_cnt = ProtoField.uint8("PowerSystemData.volt_rail_cnt", "Voltage Rail Count", base.DES)
local f_tot_btry_volt_rd = ProtoField.uint16("PowerSystemData.tot_btry_volt_rd", "Total Battery Voltage", base.DES)
local f_tot_btry_cur_rd = ProtoField.uint16("PowerSystemData.tot_btry_cur_rd", "Total Battery Current", base.DES)
local f_hrm_btry_mode_info = ProtoField.uint8("PowerSystemData.hrm_btry_mode_info", "Harmonic Battery Mode Info", base.DES)

-- Fields for arrays (treated as ProtoFields with array index)
local f_pv_volt_rd = ProtoField.uint16("PowerSystemData.pv_volt_rd", "PV Voltage Reading", base.DES)
local f_pv_cur_rd = ProtoField.uint16("PowerSystemData.pv_cur_rd", "PV Current Reading", base.DES)
local f_mppt_volt_rd = ProtoField.uint16("PowerSystemData.mppt_volt_rd", "MPPT Voltage Reading", base.DES)
local f_mppt_cur_rd = ProtoField.uint16("PowerSystemData.mppt_cur_rd", "MPPT Current Reading", base.DES)
local f_op_conv_volt_rd = ProtoField.uint16("PowerSystemData.op_conv_volt_rd", "Operating Converter Voltage", base.DES)
local f_btry_temp_sns_rd = ProtoField.uint8("PowerSystemData.btry_temp_sns_rd", "Battery Temperature Sensor Readings", base.DES)
local f_chnl_state = ProtoField.uint8("PowerSystemData.chnl_state", "Channel State", base.DES)
local f_volt_rail_cur_value = ProtoField.uint8("PowerSystemData.volt_rail_cur_value", "Voltage Rail Current Value", base.DES)
local f_chnl_ovr_cur_flg = ProtoField.uint8("PowerSystemData.chnl_ovr_cur_flg", "Channel Over Current Flag", base.DES)

-- Add the fields to the protocol
HM_TM_dissector.fields = { f_pv_cnt, f_mppt_cnt, f_op_conv_cnt, f_btry_cnt, f_btry_temp_sns_cnt, f_chnl_cnt,
    f_volt_rail_cnt, f_tot_btry_volt_rd, f_tot_btry_cur_rd, f_hrm_btry_mode_info,
    f_pv_volt_rd, f_pv_cur_rd, f_mppt_volt_rd, f_mppt_cur_rd, f_op_conv_volt_rd,
    f_btry_temp_sns_rd, f_chnl_state, f_volt_rail_cur_value, f_chnl_ovr_cur_flg 
}

for i=1,data3 do

     offset = offset+8
    local subtree = tree:add(TC_TM_PROTOCOL, buffer(), "Power System Data")

    -- dissect pv_cnt
    local pv_cnt = buffer(offset, 1):le_uint()
    subtree:add(f_pv_cnt, pv_cnt)
    offset = offset + 1

    -- dissect mppt_cnt
    local mppt_cnt = buffer(offset, 1):le_uint()
    subtree:add(f_mppt_cnt, mppt_cnt)
    offset = offset + 1

    -- dissect op_conv_cnt
    local op_conv_cnt = buffer(offset, 1):le_uint()
    subtree:add(f_op_conv_cnt, op_conv_cnt)
    offset = offset + 1

    -- dissect btry_cnt
    local btry_cnt = buffer(offset, 1):le_uint()
    subtree:add(f_btry_cnt, btry_cnt)
    offset = offset + 1

    -- dissect btry_temp_sns_cnt
    local btry_temp_sns_cnt = buffer(offset, 1):le_uint()
    subtree:add(f_btry_temp_sns_cnt, btry_temp_sns_cnt)
    offset = offset + 1

    -- dissect chnl_cnt
    local chnl_cnt = buffer(offset, 1):le_uint()
    subtree:add(f_chnl_cnt, chnl_cnt)
    offset = offset + 1

    -- dissect volt_rail_cnt
    local volt_rail_cnt = buffer(offset, 1):le_uint()
    subtree:add(f_volt_rail_cnt, volt_rail_cnt)
    offset = offset + 1
------------------------------------------------------------------------------------------------------------
for i=1, pv_cnt do 
-- dissect pv_volt_rd 
	--local pv_volt = string.unpack("<d", buffer(offset, 2):le_uint())
        local pv_volt = buffer(offset, 2):le_uint()
        subtree:add(f_pv_volt_rd, pv_volt)
        offset = offset + 2
end
for i=1, pv_cnt do 
-- dissect pv_cur_rd 
        local pv_cur = buffer(offset, 2):le_uint()
        subtree:add(f_pv_cur_rd, pv_cur)
        offset = offset + 2
end

--for i=1, mppt_cnt do 
 -- dissect mppt_volt_rd 
        local mppt_volt = buffer(offset, 2):le_uint()
        subtree:add(f_mppt_volt_rd, mppt_volt)
        offset = offset + 2
--end
--for i=1, mppt_cnt do 
-- dissect mppt_cur_rd 
        local mppt_cur = buffer(offset, 2):le_uint()
        subtree:add(f_mppt_cur_rd, mppt_cur)
        offset = offset + 2
--end

for i=1 ,op_conv_cnt do 
-- dissect op_conv_volt_rd (array of uint16, loop through based on op_conv_cnt)
        local op_conv_volt = buffer(offset, 2):le_uint()
        subtree:add(f_op_conv_volt_rd, op_conv_volt)
        offset = offset + 2
end
 -- dissect tot_btry_volt_rd
    	local tot_btry_volt_rd = buffer(offset, 2):le_uint()
    	subtree:add(f_tot_btry_volt_rd, tot_btry_volt_rd)
    	offset = offset + 2
-- dissect tot_btry_cur_rd
    	local tot_btry_cur_rd = buffer(offset, 2):le_uint()
    	subtree:add(f_tot_btry_cur_rd, tot_btry_cur_rd)
    	offset = offset + 2
for i=1, btry_temp_sns_cnt do
-- dissect btry_temp_sns_rd (array of uint8, loop through based on btry_temp_sns_cnt)
        local btry_temp = buffer(offset, 1):le_uint()
        subtree:add(f_btry_temp_sns_rd, btry_temp)
        offset = offset + 1
end

for i=1, chnl_cnt do
-- dissect chnl_state (array of uint8, loop through based on chnl_cnt)  
        local chnl_state_value = buffer(offset, 1):le_uint()
        subtree:add(f_chnl_state, chnl_state_value)
        offset = offset + 1
end 
for i=1, volt_rail_cnt do
-- volt_rail_cur_value
        local volt_rail_value = buffer(offset, 2):le_uint()
        subtree:add(f_volt_rail_cur_value, volt_rail_value)
        offset = offset + 1
end
for i=1,volt_rail_cnt do
-- dissect chnl_ovr_cur_flg (array of uint8, loop through based on chnl_cnt)
        local chnl_ovr_cur_flg_value = buffer(offset, 1):le_uint()
        subtree:add(f_chnl_ovr_cur_flg, chnl_ovr_cur_flg_value)
        offset = offset + 1
end

  -- dissect hrm_btry_mode_info
    local hrm_btry_mode_info = buffer(offset, 1):le_uint()
    subtree:add(f_hrm_btry_mode_info, hrm_btry_mode_info)
    offset = offset + 1  
end
	

end